un·perturbed \“+\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