An example of an insouciant person is someone sitting by the pool and sipping a cocktail while on vacation.
Origin of insouciantFrench ; from in-, not + souciant, present participle of soucier, to regard, care ; from Classical Latin sollicitare: see solicit
Origin of insouciantFrench : in-, not (from Old French; see in–1) + souciant, present participle of soucier, to trouble (from Old French, from Vulgar Latin *sollic&imacron;tare, alteration of Latin sollicitare, to vex; see solicit).
(comparative more insouciant, superlative most insouciant)
From French insouciant from in- (“not”) + souciant (“worrying”)