Etymology

deliriate

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Today it means: To act, speak, or reason in a manner considered insane, deluded, or absurd; to be affected by delirium. Full definition →

First used 1650s
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The story

From delirium + -ate. Compare delirate and delire.

First known use, by meaning

  • from 1650s To act, speak, or reason in a manner considered insane, deluded, or absurd; to be affected by delirium.
  • from after 1711 To make (a person) delirious; to confound (a person's mind).

Etymology from Wiktionary, CC BY-SA 4.0.