nonchalant Synonyms

unperturbed offhanded undisturbed unceremonious unruffled uninterested unconcerned tepid stolid stoical serene relaxed pococurante pluckless phlegmatic unaddicted laid-back easygoing unhurried unexcited unemotional uncaring unflappable untroubled uninvolved imperturbable unworried slaphappy happy-go-lucky devil-may-care carefree halfhearted perfunctory offhand disinterested disimpassioned detached cool-headed cool composed complacent collected casual careless blase apathetical apathetic aloof easy-going effortless