English Reference

Word

collaborate

Phoneticscol·lab·o·rate, stress on the second syllable

US/kəˈɫæbɝˌeɪt/

UK/kəlˈæbəɹˌeɪt/

Definitions

01to work together

B2 · Upper Intermediate

v. to work with another person or group to create or produce something.

v. to work jointly on an activity or project to achieve a common goal. Intransitive, typically taking the preposition 'with' for partners and 'on' for projects.

“The two artists decided to collaborate on a new mural for the city park.”

“Researchers from three different universities collaborated on the study to ensure a diverse range of data and perspectives.”

Usage

Usually followed by 'with' (people) or 'on' (tasks).

Pitfall

The two companies collaborated themselves on the project.

The two companies collaborated on the project.

Collaborate is not a reflexive verb; you do not collaborate 'yourself'.

Synonyms

Antonyms

competework alone

02to help an enemy

C1 · Advanced Formal

v. to help an enemy who has invaded or taken control of your country.

v. to cooperate treasonably with an enemy, especially an occupying force in one's own country.

“During the war, some citizens were accused of choosing to collaborate with the invaders.”

“The post-war tribunal sought to identify those who had actively collaborated with the regime during the four-year occupation.”

Teaching tip

This sense carries a very strong negative moral judgment and is much less common than the positive 'work together' sense.

Synonyms

colludeconspire

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “collaborate” in context.

Verb

01. collaborate on a project

“Several international agencies are collaborating on a major environmental project.”

verb + prep + adj + noun

02. collaborate to produce

“The two designers collaborated to produce a unique collection for the fashion show.”

verb + infinitive

03. collaborate with colleagues

“She enjoys the opportunity to collaborate with colleagues from diverse professional backgrounds.”

verb + prep + noun

Adverb

04. closely collaborate

“The two research departments closely collaborated on the vaccine development project.”

adv + verb

05. collaborate effectively

“Remote teams must use digital tools to collaborate effectively across different time zones.”

verb + adv

06. collaborate extensively

“The author collaborated extensively with local historians to ensure the book's accuracy.”

verb + adv

Real-World Examples

“As Americans withdrew from Kabul the Taliban moved in, which meant hell for women, dissidents and anyone who had collaborated with the occupiers.”
The Guardian 15 Aug 2026
“UNHCR is already collaborating closely with Syrian authorities and other development partners to address recovery needs.”
UN News 13 Aug 2026

Etymology

Back-formation from collaborator, from French collaborateur, or else modeled on French collaborer or directly from Late Latin collabōrātus, past participle of collabōrāre. Displaced native Old English efnwyrċan.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

VERB

collaborate(C1)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · AdvancedOxford
Updated

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English Reference