insouciance means carelessness, heedlessness, indifference, or casual unconcern. Lexicurio rates it Rare gem — a strength score of 78 out of 100.
Why this word is great
INSOUCIANCE — [Noun] A lighthearted or casual lack of concern; nonchalant indifference. From French insouciance, from in- ("not") + souciant ("worrying"), present participle of soucier ("to trouble or care"). Unlike "apathy," which implies a hollow, passive absence of feeling, or "heedlessness," which suggests negligent recklessness, insouciance is an active, elegant disregard, worn with a smile. It is the unbuttoned collar in a room of starched formality, the unruffled shrug that lets a grievance fall, and the whistled tune that carries over the sound of breaking news—a minor, melodic rebellion against the gravity of consequence, and the only sustainable form of freedom.
noun
- Carelessness, heedlessness, indifference, or casual unconcern.“So Gelernter, with an insouciance he now regrets, also chose a Lovelace as a namesake—Linda, the lead actress in "Deep Throat."”
- Nonchalance.“She almost felt insulted by [the wild boar's] insouciance as it rooted in her grove.”