say it: in-SOOS-yuhnt
insouciant is an adjective meaning "marked by blithe unconcern". It carries one recorded sense.
marked by blithe unconcern
“an ability to interest casual students”
“showed a casual disregard for cold weather”
“an utterly insouciant financial policy”
“an elegantly insouciant manner”
“drove his car with nonchalant abandon”
“was polite in a teasing nonchalant manner”
Definitions, synonyms and semantic relations for insouciant come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.