numb Look up numb at Dictionary.com
mid-15c., nome, lit. "taken, seized," from pp. of nimen "to take, seize," from O.E. niman "to take" (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. The verb is from c.1600.