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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The setting is practically an Elizabethan skatepark, well suited to the clashes between Romeo’s and Juliet’s irascible relatives and excitable pals.—Christopher Arnott, Hartford Courant, 29 Apr. 2025 Nottingham Forest, European champions in the two previous campaigns under the management of the irascible but brilliant Brian Clough, wanted to sign him — as did Liverpool.—Tom Burrows, New York Times, 27 Mar. 2025 After his twin brother dies, Roman (Dylan O’Brien), an irascible young man living in Portland, becomes emotionally unmoored.—Lovia Gyarkye, The Hollywood Reporter, 24 Jan. 2025 Nottingham Forest, European champions in the two previous campaigns under the management of the irascible but brilliant Brian Clough, wanted to sign him — as did Liverpool.—Tom Burrows, New York Times, 27 Mar. 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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