Etymology

idée fixe

Today it means: An idea dominating the mind and maintained despite evidence to the contrary; (loosely), an obsession. Full definition →

French idée fixe
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The story

  1. French · borrowed fromidée fixe
  2. English todayidée fixe

Borrowed from French idée fixe (literally “fixed idea”).

Words from the same roots

Frenchidée fixe all →

fixed idea

Etymology from Wiktionary, CC BY-SA 4.0.