English Reference

Word

diligence

Phoneticsdili·gence

US/ˈdɪɫədʒəns/

UK/dˈɪlɪdʒəns/

Definitions

01hard work and effort

B2 · Upper Intermediate Uncountable noun

n. careful and persistent work or effort.

n. steady, earnest, and energetic effort; the quality of being industrious and hardworking over a sustained period.

“Through hard work and diligence, she eventually became the manager of the company.”

“The student's academic success was a direct result of her diligence, as she spent every evening reviewing her notes and refining her research.”

Synonyms

Antonyms

lazinessidleness

02carefulness and attention

C1 · Advanced Uncountable noun Law Formal · Technical

n. the care that you should take when doing a job or looking into something.

n. the attention and care legally or ethically required of a person, especially in a professional or contractual context.

“The lawyer performed due diligence to make sure the contract was safe to sign.”

“The firm failed to exercise proper diligence in vetting the supplier, leading to a significant breach of safety protocols and subsequent legal action.”

Usage

Often appears in the fixed phrase 'due diligence'.

Synonyms

careattentionthoroughness

Antonyms

03a stagecoach

C2 · Proficiency Countable noun Archaic

n. a large horse-drawn carriage used for public transport in the past.

n. a public stagecoach, particularly a four-wheeled vehicle used in France and other parts of Europe before the advent of railways.

“The travellers spent three uncomfortable days on the diligence as it crossed the mountains.”

“Before the expansion of the rail network, the diligence remained the primary mode of long-distance transport for the middle classes across the continent.”

Real-World Examples

“For trusted journalists, diligence meant spending more time with the community.”
The Conversation 20 Aug 2026
“Since then none of the contracts have been confirmed, with ministers saying "due diligence" is still being carried out.”
BBC News 18 Aug 2026

Etymology

Borrowed from French diligence, from Latin diligentia.

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

Word family

NOUN

diligence(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
Frequent
Level
B2 · Upper Intermediate
Updated

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English Reference