If you try to take apart irascible on the model of irrational, irresistible, and irresponsible you might find yourself wondering what ascible means—but that's not how irascible came to be. The key to the meaning of irascible isn't the negating prefix ir- (which is the form of the prefix in- that is used before words beginning with "r"), but rather the Latin noun ira, meaning "anger." From ira, which is also the root of irate and ire, came the Latin verb irasci ("to become angry") and the related adjective irascibilis, the latter of which led to the French word irascible. English speakers borrowed the word from French in the 16th century.
an irascible old football coach
He has an irascible disposition.
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But poor casting was only half of it — Charles Walters' 1955 adaptation unfortunately reimagines the heroine as an irascible antisocial brat with delusions of grandeur, all explained away by bizarre contemporary psychoanalysis provided in voice-over.—EW.com, 4 Mar. 2025 Based on a true story, Doc follows Dr. Amy Larsen (Parker), a brilliant but irascible surgeon who forgets the last eight years of her life after she was involved in a car accident.—Lynette Rice, Deadline, 29 Jan. 2025 These irascible fish live on the intertidal mudflats of Roebuck Bay in Broome, Western Australia.—Cecilia Rodriguez, Forbes, 24 Feb. 2025 Others, like his irascible Celebrity Jeopardy standout Sean Connery, are the uncanny product of masterful tinkering, with Hammond eventually stretching the real and the perceived into a shape as recognizable as the actual figure himself.—Dennis Perkins, EW.com, 16 Feb. 2025 See All Example Sentences for irascible
Word History
Etymology
Middle French, from Late Latin irascibilis, from Latin irasci to become angry, be angry, from ira
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