perturb (v.)youdaoicibaDictYouDict[perturb 词源字典]
late 14c., from Old French perturber "disturb, confuse" (14c.) and directly from Latin perturbare "to confuse, disorder, disturb," especially of states of the mind, from per- "through" (see per) + turbare "disturb, confuse," from turba "turmoil, crowd" (see turbid). Related: Perturbed; perturbing.[perturb etymology, perturb origin, 英语词源]