The term "idee-fixe" refers to an obsessive, recurring, or fixed idea. It originates from French and is commonly used in psychology and literature. Synonyms for "idee-fixe" include fixation, obsession, preoccupation, compulsion, mania, and infatuation. Fixation implies a persistent focus or attachment to something or someone, while obsession suggests an irrational, overpowering interest or preoccupation. Preoccupation implies a deep and constant concern or thought about something, whereas compulsion suggests an irresistible urge or need to do something. Mania indicates an excessive enthusiasm or extreme excitement about something, and infatuation refers to an intense but short-lived affection for someone or something.