First Known Use of no-nonsense
Synonymsearnest, grave, humorless, no-nonsense, po-faced [British], sedate, severe, sober, sobersided, solemn, staid, uncomic, unsmiling, weighty
Antonymsfacetious, flip, flippant, humorous, jesting, jocular, joking, kittenish, ludic, playful
Related Wordsharsh, stern, strict; businesslike, professional; dignified, distinguished, elevated, serious-minded; gloomy, grim
Near Antonymsantic, comic, comical, droll, farcical, funny, hilarious, hysterical (also hysteric), laughable, light, light-headed, ludicrous, ridiculous, riotous, risible, screaming, sidesplitting, uproarious; featherbrained, flighty, frivolous, goofy, harebrained, lighthearted, puerile, scatterbrained; absurd, asinine, balmy, brainless, cockeyed, crazy, cuckoo, daffy, daft, dotty, fatuous, foolish, half-witted, insane, jerky, kooky (also kookie), loony (also looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, senseless, silly, unwise, wacky (also whacky), weak-minded, witless, zany
NO-NONSENSE Defined for English Language Learners
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