numb (adj.)youdaoicibaDictYouDict[numb 词源字典]
c. 1400, nome, "deprived of motion or feeling," literally "taken, seized," from past participle of nimen "to take, seize," from Old English niman "to take, catch, grasp" (see nimble). The extraneous -b (to conform to comb, limb, etc.) appeared 17c. The notion is of being "taken" with palsy, shock, and especially cold. Figurative use from 1560s.[numb etymology, numb origin, 英语词源]
numb (v.)youdaoicibaDictYouDict
1550s, from numb (adj.). Related: Numbed; numbing.