Definitions

diligent

[dil-i-juhnt] / ˈdɪl ɪ dʒənt /

ADJECTIVE

persevering, hard-working

Synonyms

STRONGEST

active assiduous attentive careful conscientious eager earnest indefatigable industrious painstaking persistent studious tireless

WEAK

busy constant eager beaver grind laborious occupied operose persisting pertinacious plugging sedulous steadfast unflagging unrelenting untiring

Antonyms

STRONGEST

careless disinterested idle ignorant inactive inattentive lazy neglectful thoughtless tired uncareful unconcerned unenthusiastic unscrupulous weary

WEAK

indifferent languid lethargic negligent

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In other cases, diligent taxpayers file extensions because they don’t have all the forms they need.

From MarketWatch • Jun. 8, 2026

She was a dedicated observer of the Sabbath and Jewish laws, a diligent student of Hebrew and a tireless philanthropic force in aiding vulnerable Jewish communities abroad.

From The Wall Street Journal • Jun. 7, 2026

"Luckily the keepers here are incredibly diligent, so they are noticing the subtle changes in an animal."

From BBC • Apr. 21, 2026

There was no diligent retailer in the Philippines who realized they overcharged you for an eBay or Amazon purchase you had forgotten you made years ago, and miraculously wanted to make you whole.

From MarketWatch • Mar. 25, 2026

The diligent students would do well to begin tonight memorizing his book on colds and fevers.

From "The Woman Warrior" by Maxine Hong Kingston

Vocabulary lists containing diligent

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Grade 9, List 1

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