insouciant
UK[ɪnˈsuː.si.ənt]US[ɪnˈsuː.si.ənt]
adj
showing a casual lack of concern or interest; free from worry or anxiety.
Morpheme Breakdown
in
souci
ant
in
not
souci
care
ant
adjective suffix
Etymology
The word 'insouciant' is a direct borrowing from modern French, entering English in the early 19th century. Its core component, 'souci', traces back to the Latin verb sollicitare, meaning 'to disturb, agitate', which itself derives from sollicitus ('thoroughly moved, agitated'). The French development softened this to 'souci', meaning 'care' or 'worry'. By adding the negative prefix 'in-' and the adjectival suffix '-ant', the French created 'insouciant', literally meaning 'not caring'. The English word retains this elegant sense of being untroubled and free from anxiety, capturing a lighthearted or carefree attitude.
Analysis
Structure: in (not) + souci (care) + ant (adjective suffix)
in- (Latin origin, a negative prefix meaning 'not'). souci- (French origin, from Old French soucier, meaning 'to trouble, care', ultimately from Latin sollicitus meaning 'agitated'). -ant (French/Latin origin, an adjective-forming suffix meaning 'being in a state of').
Examples
He strolled into the meeting with an insouciant air, completely unbothered by the impending deadline.
Her insouciant dismissal of the criticism surprised everyone who had expected a defensive response.
The novel captures the insouciant spirit of youth in the 1920s.