Y08W15VC Word Roots — per- (through / thoroughly)

The prefix per- comes from Latin and carries the core meaning of 'through' or 'thoroughly'. It appears in words that describe something done completely, persistently, or all the way through — whether a process, an action, or a quality. Understanding this prefix unlocks the meaning of many academic and formal English words. This module explores six such words drawn from the Academic Vocab list, plus three further examples in the Word Families section.

Word Families

These three words all connect to the root per-. As you read, notice how the meaning 'through / thoroughly' can help you infer unfamiliar words and use them with more control.

persist

/pəˈsɪˈst/

per‑sist

verb | [persist – persisted – persisted]

To continue firmly despite difficulties, opposition, or the passage of time.

Word Breakdown: per- (prefix meaning ‘through’) + -sist (from Latin ‘sistere’, meaning ‘to stand’) — to persist is to ‘stand through’ difficulty

Example: Despite repeated setbacks, the research team persisted with their investigation and eventually made a breakthrough.

Synonyms: continue, endure, persevere

Collocations: persist with, persist in, challenges persist

perceive

/pəˈsiːv/

per‑ceive

verb | [perceive – perceived – perceived]

To become aware of or understand something through the senses or through thought.

Example: How a reader perceives a character is shaped as much by what is left unsaid as by what is stated directly.

Synonyms: understand, view, recognise

Collocations: perceive as, be perceived, widely perceived

perspective

/pəˈspɛktɪv/

per‑spec‑tive

noun

A particular way of thinking about or interpreting a situation, shaped by one’s experience or position.

Example: Examining an issue from multiple perspectives allows for a more complete and nuanced understanding.

Synonyms: viewpoint, standpoint, angle

Collocations: offer a perspective, from a perspective, multiple perspectives

Academic Vocab

illustrate

/ˈɪləstreɪt/

il‑lus‑trate

verb | [illustrate – illustrated – illustrated]

To make something clear by using examples, diagrams, or comparisons; to demonstrate a point vividly.

Word family: illustration (n.), illustrative (adj.)

Example: The writer illustrates her argument about inequality by presenting the experiences of three different families.

Synonyms: demonstrate, show, exemplify

Collocations: illustrate a point, illustrate with an example, clearly illustrate

infer

/ɪnˈfɜː/

in‑fer

verb | [infer – inferred – inferred]

To reach a conclusion based on evidence or reasoning, without being told directly.

Word Breakdown: in- (prefix meaning ‘in’ or ‘into’)

Word family: inference (n.), inferential (adj.)

Example: From the way the character hesitates, the reader can infer that she is concealing something important.

Synonyms: conclude, deduce, reason

Collocations: infer from, infer that, reasonably infer

justify

/ˈdʒʊstɪfaɪ/

jus‑ti‑fy

verb | [justify – justified – justified]

To show or prove that a decision, action, or argument is reasonable, correct, or necessary.

Word family: justification (n.), justified (adj.)

Example: The writer must justify each claim with relevant and reliable evidence from the text.

Synonyms: defend, support, validate

Collocations: justify a decision, justify the claim, be justified

minimise

/ˈmɪnɪmaɪz/

min‑i‑mise

verb | [minimise – minimised – minimised]

To reduce something to the smallest possible amount, degree, or importance.

Word family: minimal (adj.), minimum (n.)

Example: The policy aimed to minimise disruption to students during the transition to the new timetable.

Synonyms: reduce, limit, decrease

Collocations: minimise risk, minimise disruption, minimise the impact

prioritise

/praɪˈɒrɪtaɪz/

pri‑or‑i‑tise

verb | [prioritise – prioritised – prioritised]

To decide which tasks or issues are most important and deal with them first.

Word family: priority (n.), prioritisation (n.)

Example: Effective writers prioritise clarity, ensuring their argument is easy for the reader to follow.

Synonyms: focus on, rank, order

Collocations: prioritise needs, prioritise safety, prioritise wellbeing

this shows

/ðɪs ʃəʊz/

this shows

phrase

A writing function phrase used to indicate that the preceding evidence directly demonstrates the point being made.

Example: The graph shows a consistent decline over five years; this shows that current strategies are not achieving the desired outcome.

Synonyms: this demonstrates, this proves, this indicates

Collocations: this shows that, this clearly shows, this shows a

Confusing Words

comprise vs consist of

Comprise and consist of are frequently confused and sometimes used incorrectly.

  • comprise — Comprise means ‘to be made up of’ or ‘to include’ — and the whole comprises the parts: 'The committee comprises five members.'
  • consist of — Consist of means the same thing but is used differently: the whole consists of the parts: 'The committee consists of five members.' The most common error is writing 'comprised of', as in 'the committee is comprised of five members.' This is technically incorrect, though widely used; in formal writing, prefer 'comprises' or 'consists of'.

Memory rule: A useful rule: the whole comprises the parts (no 'of'); the whole consists of the parts (always with 'of'). Avoid 'comprised of' in formal writing. When in doubt, use 'consists of', which is always safe.