English Reference

Word

rely

Phoneticsre·ly, stress on the second syllable

US/ɹiˈɫaɪ/

UK/ɹɪlˈaɪ/

Definition

v. to need or trust someone or something to help you. You use this when you cannot do something alone and must depend on another person or tool.

v. to depend on someone or something with full trust or confidence; to be dependent on for support or success. Intransitive — requires a prepositional complement to function.

Examples

“I rely on my alarm clock to wake me up.”

“Many small businesses rely on social media to reach new customers without spending a fortune on advertising.”

“Modern infrastructure has become so interconnected that urban populations now rely on stable satellite data for everything from financial transactions to emergency response coordination.”

Examples

simple

“I rely on my alarm clock to wake me up.”

contextual

“Many small businesses rely on social media to reach new customers without spending a fortune on advertising.”

complex

“Modern infrastructure has become so interconnected that urban populations now rely on stable satellite data for everything from financial transactions to emergency response coordination.”

Collocations

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

Adverb

01. exclusively rely

“The island's residents exclusively rely on solar power for their electricity.”

adv + verb

02. heavily rely

“Many local businesses heavily rely on seasonal tourism to survive.”

adv + verb

03. mainly rely

“Students in this course mainly rely on digital textbooks rather than printed ones.”

adv + verb

04. primarily rely

“The charity primarily relies on private donations to fund its research projects.”

adv + verb

05. rely on readers

06. rely heavily

07. approach rely

08. model rely

09. rely on a single

10. rely on others

11. relying solely

12. relying too

Usage

The verb is intransitive and almost always takes the preposition 'on' or 'upon' before the object.

Pitfall

I rely my parents for money

I rely on my parents for money

Rely is an intransitive verb and cannot take a direct object; it must be followed by the preposition 'on'.

Confusables

rely vs depend

Depend describes a logical or physical necessity where one thing is controlled by another, while rely emphasizes a personal sense of trust or confidence in someone's support.

RememberDepend is for needs; rely is for trust.

Real-World Examples

“Keron relies on Dani, whose duties include cleaning and dressing him; she relies on him, as her employer.”
The Guardian 12 Aug 2026
“Social care is relied on by people of all ages.”
The Guardian 4 Aug 2026

Etymology

From Middle English relien, from Old French relier (“fasten, attach, rally, oblige”), from Latin religo (“fasten, bind fast”), from re- + ligo.

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

Word family

VERB

rely(B2)

ADJECTIVE

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
Common
Level
B2 · Upper IntermediateOxford
Updated

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English Reference