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[ih-rash-uh-nl-ahyz] /ɪˈræʃ ə nlˌaɪz/
verb (used with object), irrationalized, irrationalizing.
to make or cause to be irrational.
Also, especially British, irrationalise.
Origin of irrationalize
1890-95; irrational + -ize Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • The poor man wants to rationalize the irrational, and irrationalize the rational.

    Rosinante to the Road Again John Dos Passos
  • And he wishes, unhappy man, to rationalize the irrational and irrationalize the rational.

    Tragic Sense Of Life Miguel de Unamuno

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