Y08W13VC Word Roots — ex- (out / from)

The prefix ex- comes from Latin and carries the core meaning of 'out' or 'from'. It appears in words that describe moving outward, removing something, making something visible, or going beyond a boundary. 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 ex-. As you read, notice how the meaning 'out / from' can help you infer unfamiliar words and use them with more control.

exclude

/ɪkˈskluːd/

ex‑clude

verb | [exclude – excluded – excluded]

To deliberately keep someone or something out, or to leave something out of a group or category.

Word Breakdown: ex- (prefix meaning ‘out’) + -clude (from Latin ‘claudere’, meaning ‘to close’) — to exclude is to ‘close out’

Example: The study excluded participants who had not completed all phases of the trial.

Synonyms: omit, bar, leave out

Collocations: exclude from, be excluded, exclude data

explicit

/ɪkˈsplɪsɪt/

ex‑plic‑it

adjective

Stated clearly and directly, leaving no room for misunderstanding; not implied or hidden.

Example: The instructions were explicit: no prior knowledge of the topic was required.

Synonyms: clear, direct, unambiguous

Collocations: explicit instructions, make explicit, explicitly stated

examine

/ɪɡˈzæmɪn/

ex‑am‑ine

verb | [examine – examined – examined]

To inspect or investigate something carefully and in detail.

Example: The historian examined a wide range of primary sources before drawing her conclusions.

Synonyms: investigate, analyse, inspect

Collocations: examine closely, examine evidence, examine the impact

Academic Vocab

accumulate

/əˈkjuːmjəleɪt/

ac‑cu‑mu‑late

verb | [accumulate – accumulated – accumulated]

To gradually gather or collect a large amount of something over time.

Word family: accumulation (n.)

Example: Strong essays accumulate evidence steadily throughout the body paragraphs rather than saving it all for the end.

Synonyms: gather, collect, build up

Collocations: accumulate evidence, accumulate wealth, gradually accumulate

comprise

/kəmˈpraɪz/

com‑prise

verb | [comprise – comprised – comprised]

To consist of or be made up of a number of parts or elements.

Word Breakdown: com- (prefix meaning ‘together’)

Example: The committee comprises representatives from twelve different community organisations.

Synonyms: consist of, include, be made up of

Collocations: comprise of (avoid), is comprised of (avoid), comprises

coordinate

/kəʊˈɔːdɪneɪt/

co‑or‑di‑nate

verb | [coordinate – coordinated – coordinated]

To organise different elements or people so they work together effectively.

Word Breakdown: co- (prefix meaning ‘together’)

Word family: coordination (n.), coordinator (n.)

Example: The relief effort required multiple agencies to coordinate their responses across different regions.

Synonyms: organise, manage, arrange

Collocations: coordinate efforts, coordinate a response, well-coordinated

deduce

/dɪˈdjuːs/

de‑duce

verb | [deduce – deduced – deduced]

To reach a conclusion by reasoning from known facts or evidence.

Word family: deduction (n.), deductive (adj.)

Example: From the available evidence, investigators were able to deduce that the fire had been deliberately lit.

Synonyms: conclude, infer, reason

Collocations: deduce from, logically deduce, deduce that

discriminate

/dɪˈskrɪmɪneɪt/

dis‑crim‑i‑nate

verb | [discriminate – discriminated – discriminated]

To treat a person or group differently and unfairly based on characteristics such as race, gender, or age; or to recognise distinctions.

Word Breakdown: dis- (prefix meaning ‘apart’)

Word family: discrimination (n.), discriminatory (adj.)

Example: Legislation was introduced to ensure that employers could not legally discriminate against applicants on the basis of age.

Synonyms: differentiate, distinguish, treat unfairly

Collocations: discriminate against, racial discrimination, discriminatory practice

this reveals

/ðɪs rɪˈviːlz/

this re‑veals

phrase

A writing function phrase that signals the writer is drawing attention to a hidden or significant meaning found in the evidence.

Example: The language of the policy document is notably passive; this reveals an unwillingness to assign clear responsibility.

Synonyms: this shows, this exposes, this uncovers

Collocations: this reveals that, this reveals a, this clearly reveals

Confusing Words

phenomenon vs phenomena

Phenomenon and phenomena represent a common singular/plural error in academic writing.

  • phenomenon — Phenomenon is the singular form — it refers to one observable event or occurrence: 'Climate change is a complex phenomenon that affects every region of the world.'
  • phenomena — Phenomena is the plural form and should be used when referring to more than one: 'Scientists are studying several interconnected climate phenomena simultaneously.' The error occurs when writers use 'phenomena' as a singular ('a phenomena') or 'phenomenon' as a plural ('these phenomenon').

Memory rule: A useful rule: phenomenon = one; phenomena = many. Just as 'criterion' becomes 'criteria', 'phenomenon' becomes 'phenomena'. Never write 'a phenomena' or 'these phenomenon'.