English Reference

Word

trust

US/ˈtɹəst/

UK/tɹˈʌst/

Definitions

01to believe in someone

A2 · Elementary

v. to believe that someone is honest, good, and will not harm you.

v. to place confidence in the reliability, truth, or ability of someone or something.

“You can trust her with your secrets because she never tells anyone.”

“After years of working together, the partners had learned to trust each other's instincts during difficult negotiations.”

Pitfall

I trust to him.

I trust him.

When you believe a person is honest, the verb is transitive and does not need a preposition.

Synonyms

believerely onconfide in

Antonyms

02to hope

B1 · Intermediate Formal

v. to hope or expect that something is true or will happen.

v. to believe or hope with a degree of confidence; often introduces a clause.

“I trust that you had a safe journey home last night.”

“The director wrote to the shareholders, stating he trusted the new strategy would yield results by the third quarter.”

Synonyms

03the feeling of belief

B1 · Intermediate Uncountable noun

n. the belief that you can rely on someone or something.

n. a firm belief in the reliability, truth, or ability of someone or something; an uncountable abstract noun in this sense.

“It takes a long time to build trust in a new relationship.”

“The scandal severely damaged the public's trust in the local government's ability to manage the budget.”

04legal arrangement

B2 · Upper Intermediate Countable noun Law Technical

n. a legal way to hold money or property for someone else, like a child.

n. a fiduciary arrangement where a third party holds assets on behalf of a beneficiary.

“Her grandparents put money in a trust for her university education.”

“The estate was held in a discretionary trust to ensure the assets were protected for future generations.”

05large business group

C1 · Advanced Countable noun Academic

n. a large group of companies that work together to control a market.

n. a large-scale business combination or monopoly formed to restrict competition.

“The government introduced new laws to break up the oil trust.”

“Nineteenth-century legislators struggled to regulate the powerful steel trusts that dominated the national economy.”

06computing access

C1 · Advanced Uncountable noun Computing Technical

n. a setting that allows a computer or user to access a system.

n. the degree to which a system or component is allowed to access resources based on verified identity.

“The administrator had to establish a trust between the two servers.”

“Zero-trust architecture requires every user to be authenticated before gaining access to the private network.”

07believe me

C1 · Advanced Slang · Informal

interj. a short way to say 'believe me' or 'I am telling the truth'.

interj. an elliptical form of 'trust me', used for emphasis or to assert the truth of a statement.

“That movie is the best one I have seen all year, trust.”

“You don't want to go to that part of town after dark, trust; it's not as safe as it looks.”

Synonyms

honestlybelieve me

Collocations

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

Verb

01. betray someone's trust

“She felt devastated when her best friend betrayed her trust by sharing her secrets.”

verb + possessive + noun

02. place trust in someone

“Investors place their trust in the company's ability to innovate.”

verb + noun + prep + noun

03. win someone's trust

“The new manager worked hard to win the team's trust during his first month.”

verb + possessive + noun

04. build trust

“It takes a long time to build trust in a new relationship.”

verb + noun

Adjective

05. absolute trust

“I have absolute trust in my doctor's medical advice.”

adj + noun

06. mutual trust

“A successful partnership is always based on mutual trust and respect.”

adj + noun

Noun

07. breach of trust

“Lying to the board was considered a serious breach of trust.”

noun + of + noun

08. lack of trust

“The project failed primarily because of a lack of trust between the two departments.”

noun + of + noun

Real-World Examples

“Would you trust your child to stay home alone?”
Phys.org 17 Aug 2026
“The success of China’s efforts may depend on building global trust, however.”
The Conversation 12 Aug 2026

Etymology

From Middle English trust and trost ("trust, protection"). The word was long thought borrowed from Old Norse traust ("confidence, help, protection"), from Proto-Germanic \traustą, but the vowel pattern does not match, so trust is now judged a native reflex of an unattested Old English \trust — a rare zero-grade variant of the same Germanic root also found in Middle High German getrüste ("host"). Ultimately from Proto-Indo-European \deru-* ("be firm, hard, solid").

The cognates are scattered across the North Sea: Danish trøst ("comfort, solace"), Saterland Frisian Traast ("comfort, solace"), West Frisian treast ("comfort, solace"), Dutch troost ("comfort, consolation"), German Trost ("comfort, consolation"), Gothic trausti ("alliance, pact"). The word is a doublet of tryst.

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

Synonyms

Antonyms

Word family

VERB

trust(B2)

Related words

Idioms

Domains

ComputingLaw

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Very common
Level
B2 · Upper IntermediateOxford
Updated

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