insouciant means casually unconcerned; carefree, indifferent, nonchalant. It carries an Arena rating of 1769, earned across 9 head-to-head judged battles.
insouciant is pronounced /ɪnˈsuːsɪənt/.
Why “insouciant” is a great word
Displaying a lighthearted indifference, as if worries were weights one has simply decided not to carry. From French insouciant, from in- ("not") + souciant ("worrying"), present participle of soucier ("to worry"), it was first recorded in English in 1828. Unlike "nonchalant," which often implies a deliberate, cool performance of detachment, or "apathetic," which connotes a dull, passive void of feeling, insouciance is an active, cheerful refusal. It is the sun-dappled whistle in a looming shadow, the perfectly tied cravat on the eve of a duel, or the unperturbed sip of wine as the first stones strike the window—a fragile, flamboyant act of grace against the gravity of the world.
Etymology
From French insouciant, from in- (“not”, prefix) + souciant (“worrying”), 1828.
adj
- Casually unconcerned; carefree, indifferent, nonchalant.“an insouciant gesture”