Advanced suffixes. 45 questions on suffix chains, formal vs informal suffix variants, suffix-triggered spelling changes, and suffix productivity in academic register.
What this test covers
- Suffix Chains and Multi-Step Word Formation
- Formal vs Informal Suffix Variants and Register
- Suffix-Triggered Spelling Changes and Non-Standard Forms
Answer the 45 questions below. Each answer is checked straight away, with an explanation. Press Submit at the end to get your score and save it to your dashboard. Answers are not kept if you leave before submitting.
All 45 questions with answers
Pick an answer for each question to see if you are right, with the explanation. Submit when you are done; you can submit before answering them all.
-
Q1The ___ of the regional currency was necessary to prevent further economic decline.
Answer: A. stabilisation
The sentence requires a noun to act as the head of the subject phrase. 'Stabilisation' is an abstract noun formed by adding the suffix '-ation' to the verb 'stabilise' to describe a process. While the gerund 'stabilising' (a verb acting as a noun) is possible, 'stabilisation' is the preferred formal term for the economic action described. 'Stabilised' is a past participle used as an adjective, and 'stabilise' is the base verb form.
-
Q2Which sentence is correct?
Answer: A. The argument presented in the research paper was fundamentally flawed.
The noun 'argument' is formed by adding the suffix '-ment' to the verb 'argue'. Notably, 'argue' is an exception to the rule of keeping a silent 'e' before '-ment' (unlike 'achievement'). 'Arguing' is a gerund that suggests the ongoing act of debating rather than the specific rhetorical point made. 'Arguments' is a plural noun that would require the plural verb 'were' rather than 'was'. 'Argued' is a past participle and cannot function as a noun here.
-
Q3The ___ of the procedure caused significant delays in the laboratory report.
Answer: C. complexity
The abstract noun 'complexity' is formed by adding the suffix '-ity' to the adjective 'complex'. While the suffix '-ness' is highly productive and can form 'complexness', '-ity' is the established standard in formal and academic registers. 'Complexes' is the plural noun or a verb form, and 'complexing' is a participle. The term 'complexnessness' is a non-existent formation containing a double suffix.
-
Q4Which sentence is correct?
Answer: C. The committee decided to interpret the data independently.
The infinitive marker 'to' requires the base form of the verb, 'interpret'. 'Interpretation' is a noun and cannot follow 'to' in a verbal sense. 'Interpreted' is the past tense form, and 'interpreting' is the present participle or gerund. Note that 'interpretate' is a common non-standard error—a 'back-formation' created mistakenly from the noun 'interpretation'—but 'interpret' is the only correct base verb.
-
Q5State ___ is a complex phenomenon often studied in political science.
Answer: C. nationalisation
The subject of the sentence must be a noun. 'Nationalisation' is an abstract process noun formed from the verb 'nationalise' using the suffix '-ation'. In British English, '-isation' is the standard spelling, while American English uses '-ization'. 'Nationalise' is the verb, 'nationalised' is its past participle, and 'national' is an adjective; none of these can serve as the nominal head (the main noun) in this sentence structure.
-
Q6Which sentence is correct?
Answer: A. The reliable source of information provided the necessary evidence.
The adjective 'reliable' is formed by adding the suffix '-able' to the verb 'rely'. When adding a suffix beginning with a vowel to a word ending in 'y', the 'y' usually changes to 'i'. 'Reliably' is an adverb, which cannot modify the noun 'source'. 'Relying' and 'relied' are participles; while 'relied-upon' could work, 'reliable' is the standard adjective used to describe someone or something that can be trusted.
-
Q7The ___ of the design team was evident in the innovative project proposal.
Answer: C. creativity
To describe the quality of being creative, 'creativity' is the standard abstract noun formed with the suffix '-ity'. 'Creations' refers to the actual objects or products produced, which does not fit the context of a team's inherent talent. 'Creative' is an adjective, and 'creativeness' is a valid but much less common variant in formal writing. The form 'creativenessness' is a morphological error.
-
Q8Which sentence is correct?
Answer: D. The musician performed a complex concerto at the gala.
The sentence requires an action-performing noun—a noun denoting a person who performs an action. The suffix '-ian' is added to 'music' to form 'musician'. 'Music' is the abstract art form itself and cannot 'perform'. 'Musical' is primarily an adjective (though it can be a noun for a play), and 'musically' is an adverb. Neither can function as the human subject of the verb 'performed'.
-
Q9In legal contexts, the judge exercised sound ___.
Answer: D. judgment
The noun 'judgment' (often spelled 'judgement' in British English) is required after the adjective 'sound'. This noun is formed by adding '-ment' to the verb 'judge'. 'Judicious' is an adjective meaning 'wise' or 'having good judgment'; 'judging' is a participle or gerund; and 'judge' used as a noun refers to the person in court, not the mental faculty of making decisions.
-
Q10The widespread ___ of the vaccine improved public health outcomes significantly.
Answer: A. immunisation
The sentence requires a noun to describe a process. 'Immunisation' is derived from the verb 'immunise' using the suffix '-ation' (forming '-isation'). 'Immune' is the base adjective describing a state of protection. 'Immunise' is the verb form, and 'immunised' is the past participle used as an adjective. Only the noun 'immunisation' fits the grammatical gap after the adjective 'widespread'.
-
Q11The ___ of the request was unclear, leading to further clarification.
Answer: B. specificity
'Specificity' is the formal abstract noun derived from 'specific' using the suffix chain '-ic' + '-ity'. While '-ness' can technically be added to many adjectives, 'specificity' is the established technical term in academic and professional contexts. 'Specifying' is a gerund (an -ing verb acting as a noun), and 'specifics' refers to a plural collection of concrete details rather than the abstract quality of being specific.
-
Q12Which sentence is correct?
Answer: C. The informativeness of the article was praised by the peer reviewers.
The noun 'informativeness' is formed by adding the suffix '-ness' to the adjective 'informative'. It describes the abstract quality of being useful or full of information. 'Informing' is a participle; 'informative' and 'informed' are adjectives. These cannot act as the subject of the sentence after the definite article 'the' in this specific context.
-
Q13The ___ of the new policy was debated extensively during the hearing.
Answer: D. rationalisation
The sentence needs a noun to serve as the subject. 'Rationalisation' is formed by adding the process suffix '-isation' to the verb 'rationalise'. This describes the act of making something logical or providing a justification for it. 'Rational' is an adjective, 'rationalise' is a verb, and 'rationally' is an adverb; none of these are grammatically correct as the head of the noun phrase 'The ___ of the new policy'.
-
Q14Which sentence is correct?
Answer: A. The notable discrepancy in the accounts required immediate investigation.
The adjective 'notable' (meaning 'worthy of notice' or 'significant') is formed by adding '-able' to 'note'. 'Noteable' is a common misspelling — the 'e' from 'note' is dropped when adding '-able'. 'Noting' is a participle and 'notes' is a noun or verb; neither can correctly modify 'discrepancy' as an adjective.
-
Q15The firm implemented an ___ strategy to reduce operational costs.
Answer: D. economical
There is a distinction between 'economic' (relating to the study of economics or the national economy) and 'economical' (avoiding waste; thrifty). Since the goal is to reduce costs, 'economical' is the correct adjective. 'Economy' is a noun, and 'economising' is a participle. Although 'economising' could function as an adjective, 'economical' is the standard lexical choice for a strategy that saves money.
-
Q16His ___ style was deemed unsuitable for an academic journal.
Answer: D. writerly
The suffix '-ly' can be added to nouns (like 'writer') to form adjectives meaning 'characteristic of'. 'Writerly' refers to a style that highlights the author's craft or is self-consciously literary. 'Written' is a past participle; 'literarily' is an adverb and cannot modify the noun 'style' in this adjective position; and 'wrote' is a past tense verb. 'Writerly' is the specific term used in stylistic criticism to describe the nature of the prose itself.
-
Q17The ___ of the user interface allows for a highly tailored experience.
Answer: A. personalisation
A noun is required to denote the process of tailoring something. 'Personalisation' is derived from the verb 'personalise' (itself from 'personal') using the suffix '-ation'. 'Personally' is an adverb, 'personal' is an adjective, and 'personalise' is a verb. Only the noun form fits grammatically after 'The' to function as the subject of the verb 'allows'.
-
Q18Which sentence is correct?
Answer: A. Data analysis requires valuable insights from raw input.
The adjective 'valuable' is formed by adding '-able' to the verb 'value' (dropping the final 'e'). It indicates that the insights possess high worth or utility. 'Valued' usually suggests that something is esteemed or highly regarded by someone; 'valuing' is a gerund; and 'values' is a plural noun. 'Valuable' is the standard adjective for describing the usefulness of data insights.
-
Q19The discovery was a ___ event that changed the course of the war.
Answer: C. historic
Adjectives ending in '-ic' and '-ical' often have distinct meanings. 'Historic' means famous or significant in history (an important event), whereas 'historical' simply refers to anything related to the past. Changing the course of a war makes an event 'historic'. 'History' is a noun and 'historically' is an adverb; neither can modify 'event' as an adjective.
-
Q20Which sentence is correct?
Answer: C. Researchers comment on the findings in the final chapter.
'Comment' is the standard verb for academic discussion. 'Commentate' is a back-formation from 'commentator' and is usually reserved for sports broadcasting or live reporting. 'Commentary' is a noun, and 'commenting' is a participle. In this sentence, a finite (main) verb is needed to complete the clause, making 'comment' the only correct choice.
-
Q21The author faced harsh ___ regarding the methodology of the study.
Answer: C. criticism
The sentence requires a noun following the adjective 'harsh'. 'Criticism' is the noun form, created by adding '-ism' to the root 'critic'. 'Critical' is an adjective, 'criticise' is a verb, and 'critically' is an adverb. Only 'criticism' satisfies the grammatical requirement for a noun representing the evaluations or judgments received by the author.
-
Q22Which sentence is correct?
Answer: C. The beautiful scenery was captured in the landscape photograph.
The adjective 'beautiful' is formed by adding '-ful' to the noun 'beauty', with 'y' changing to 'i'. Only an adjective can directly modify a noun like 'scenery'. 'Beautifully' is an adverb and cannot modify a noun. 'Beauty' is a noun, and 'beautician' refers to a person who provides beauty treatments; neither can function as an adjective modifying 'scenery'.
-
Q23The performance was a ___ example of minimalist art.
Answer: A. classic
The adjective 'classic' denotes something that is a perfect, definitive, or archetypal example of its type. 'Classical' (not listed) usually refers to Greek/Roman antiquity or formal music. 'Classics' is a noun for the study of ancient literature; 'classically' is an adverb; and 'classifying' is a participle. 'Classic' is the standard adjective for an exemplary case.
-
Q24Which sentence is correct?
Answer: D. The team worked in a friendly manner to resolve the conflict.
Many adjectives ending in '-ly' (like 'friendly', 'lovely', 'lonely') do not have a standard adverbial form ending in '-lily'. To use these words as adverbs, English typically employs a periphrastic construction (a phrase used instead of a single word) such as 'in a friendly manner'. Using 'friendly' alone as an adverb is considered informal or non-standard.
-
Q25The ___ of the enzyme was observed under controlled conditions.
Answer: A. activation
'Activation' is the abstract noun describing the process of making something active, formed by adding '-ion' to the verb 'activate'. 'Activate' is a verb, 'active' is an adjective, and 'actively' is an adverb. Since the gap follows the definite article 'The' and precedes a prepositional phrase, a noun is required.
-
Q26The ___ situation in the country remains volatile.
Answer: A. political
The adjective 'political' is needed to modify the noun 'situation'. It is formed by adding '-al' to the root. 'Politics' is a noun, 'politician' is a noun referring to a person (an action-performing noun), and 'politically' is an adverb. Note that 'politic' is also an adjective, but it means 'wise' or 'prudent' rather than relating to government.
-
Q27In British academic writing, scholars often ___ the results of their surveys.
Answer: C. analyse
In British English, the verb suffix is '-yse' (analyse), whereas American English uses '-yze' (analyze). This distinction is a key marker of regional register. 'Analysis' is the noun form, and 'analytic' is the adjective form. 'Analyzing' uses the American spelling and is a participle form, which would not fit the simple present plural subject 'scholars' here.
-
Q28Which sentence is correct?
Answer: A. The incomprehensible text was revised for clarity.
'Incomprehensible' is a formal adjective formed with the negative prefix 'in-', the root 'comprehend', and the suffix '-ible' (indicating possibility). 'Understandably' is an adverb and cannot modify 'text'. 'Understanding' is a participle that describes a person, not a piece of writing. 'Understand' is a verb and cannot modify 'text' attributively.
-
Q29The chemical ___ process ensures the purity of the final product.
Answer: B. purification
A noun is required to form a compound with 'process' or to describe the action. 'Purification' is the process noun formed by adding '-fication' to the verb 'purify' (changing '-fy' to '-fication'). 'Purify' is a verb, 'pure' is an adjective, and 'purely' is an adverb. Only 'purification' correctly names the activity described.
-
Q30Which sentence is correct?
Answer: A. The referral process for new patients is automated.
When adding the suffix '-al' to the verb 'refer', the final 'r' is doubled because the stress is on the final syllable of the root (re-FER). This is a standard orthographic (spelling) rule. 'Referral' is the noun denoting the act of referring. 'Refer' is the base verb, 'referring' is the present participle (also requiring a double 'r'), and 'referred' is the past participle.
-
Q31The ___ of the global market has influenced trade policies.
Answer: D. globalisation
The sentence requires a noun to describe a large-scale process. 'Globalisation' (or 'globalization' in US English) is formed using the suffix chain '-al' + '-ise' + '-ation'. 'Globalist' is a noun or adjective describing a person or ideology; 'globalise' is the verb; and 'globalising' is a participle. Only 'globalisation' refers to the overall phenomenon.
-
Q32Which sentence is correct?
Answer: A. The scientific data lacked empirical rigour.
The adjective 'scientific' is the standard way to describe data related to science, formed with the suffix '-ific'. Using 'science' as a noun adjunct (a noun used as an adjective) is common in speech but less formal than 'scientific'. 'Science-like' is an informal construction, and 'scientifically' is an adverb, which cannot modify the noun 'data' directly.
-
Q33The ___ of the manuscript was questioned by the literary critic.
Answer: B. originality
To describe the abstract quality of being original, the suffix '-ity' is added to the adjective 'original' to form the noun 'originality'. 'Originate' is the verb (to begin), 'original' is the adjective, and 'originally' is the adverb. The grammatical context (following 'The') requires a noun.
-
Q34Which sentence is correct?
Answer: C. The pitiable condition of the infrastructure was noted in the report.
The adjective 'pitiable' (meaning 'arousing pity' or 'deplorable') is formed by adding '-able' to 'pity', changing the 'y' to 'i'. 'Pitying' describes someone who feels pity (e.g., 'a pitying look'), which does not apply to inanimate objects like infrastructure. 'Pity' is a noun and cannot modify 'condition' in this way.
-
Q35The ___ outcome of the experiment was unexpected.
Answer: A. comical
'Comical' is an adjective meaning 'amusing' or 'laughable', often in an absurd or unintentional way. 'Comic' is also an adjective but often relates specifically to the genre of comedy (e.g., 'a comic actor'). 'Comically' is an adverb, 'comics' is a plural noun, and 'comicness' is a non-standard formation that is rarely used.
-
Q36Which sentence is correct?
Answer: B. The management of the department was questioned.
The abstract noun 'management' is formed by adding the suffix '-ment' to the verb 'manage'. It refers to the act or process of controlling a department. 'Managerial' is an adjective (e.g., 'managerial duties') and cannot be the subject of this sentence. 'Manage' is a verb, and 'managey' is an informal, non-standard term.
-
Q37The ___ of the mixture was achieved through rapid cooling.
Answer: B. solidification
The process noun 'solidification' is required. It is formed by adding the complex suffix '-fication' to the root 'solid' (usually via the verb 'solidify'). 'Solid' is an adjective describing a state, 'solidify' is the verb, and 'solidly' is an adverb. 'Solidification' is the only form that correctly names the process itself.
-
Q38The ___ of the new project was approved by the council.
Answer: B. development
The noun 'development' is formed from the verb 'develop' by adding '-ment'. It denotes the state or act of developing. While 'developing' can be a gerund, 'development' is the standard lexical choice for a formal plan or project. 'Developed' is an adjective or past tense verb, and 'develop' is the base verb.
-
Q39The ___ of the evidence was beyond doubt.
Answer: D. validity
'Validity' is the abstract noun for the quality of being valid (legally or logically sound), formed with the suffix '-ity'. 'Valid' is an adjective, 'validate' is the verb meaning 'to make valid', and 'validly' is the adverb. Only the noun 'validity' can follow the article 'The' as the subject.
-
Q40Which sentence is correct?
Answer: D. The logical approach failed to convince the board.
The adjective 'logical' is formed by adding '-al' to the noun 'logic'. It is required to modify the noun 'approach'. 'Logician' refers to a person who studies logic (an action-performing noun); 'logically' is an adverb; and 'logic' is the noun itself. In academic English, 'logical' is the standard adjective for describing reasoning.
-
Q41The ___ of the workforce was a key initiative of the new CEO.
Answer: A. humanisation
The noun 'humanisation' describes the process of making something more humane or human-centered. It is derived from the verb 'humanise' using the suffix '-isation'. 'Human' is an adjective or a noun for a person; 'humanly' is an adverb; and 'humanise' is the verb. Only 'humanisation' works as the subject of the sentence.
-
Q42Which sentence is correct?
Answer: B. The durability of the materials was tested under stress.
The noun 'durability' (the quality of being durable) is formed by adding '-ity' to 'durable', dropping the final 'e'. 'Durable' is an adjective, and 'durably' is an adverb. 'Durance' is an archaic (old-fashioned) word for imprisonment and is not related to the physical strength of materials.
-
Q43The ___ of the new software was completed ahead of schedule.
Answer: B. installation
'Installation' is the noun describing the process of setting up software, created using the suffix '-ation' on the verb 'install'. While 'installing' is a gerund that could describe the ongoing act, 'installation' is the standard term for the completed process or event. 'Install' is a verb and 'installed' is a past participle/adjective.
-
Q44The ___ of the evidence was confirmed by the investigators.
Answer: C. reliability
'Reliability' is the abstract noun for the quality of being reliable, formed by adding '-ity' to the adjective 'reliable' (which in turn comes from the verb 'rely'). 'Reliable' is the adjective, 'reliably' is the adverb, and 'rely' is the verb. The grammatical position after 'The' requires a noun.
-
Q45The ___ of the contract was confirmed by the legal department.
Answer: A. validity
The gap requires a noun denoting the state of being legally binding. 'Validity' is the correct form, derived from 'valid' + '-ity'. 'Validate' is a verb, 'validly' is an adverb, and 'valid' is an adjective. Only 'validity' correctly identifies the abstract legal status of the contract.
Done? Submit to get your score.
Answer at least one question to submit. Questions you leave out count as skipped.