“+ adjective
Etymology: Middle English, from un- (I) + perturbed, past participle of perturben to perturb
: not perturbed : unaffected by worry, interruption, disturbance, or disarrangement
a fox who was completely unperturbed by my appearance — S.P.B.Mais
• un·perturbedly “+ adverb
• un·per·turbed·ness -b(ə̇)dnə̇s noun -es