insouciance
Word family nouninsoucianceadjectiveinsouciantadverbinsouciantly
in·sou·ci·ance /ɪnˈsuːsiəns/ noun [uncountableU] formal —insouciant adjectiveadj
—insouciantly adverbadv
insouciance• For all her apparent insouciance, she was desperately unhappy. Origin insouciance (1800-1900) French soucier “to trouble”