nonchalant
/ˈnɒnʃələnt/adjective
- (of a person or manner) feeling or appearing casually calm and relaxed; not displaying anxiety, interest, or enthusiasm（人, 态度）漠然的, 冷淡的; 漠不关心的：
she gave a nonchalant shrug.
她冷淡地耸了耸肩。
派生词
nonchalance
nounnonchalantly
adverb词源
mid 18th cent.: from French, literally 'not being concerned', from the verb nonchaloir.