disable (v.)youdaoicibaDictYouDict[disable 词源字典]
mid-15c., from dis- "do the opposite of" + ablen (v.) "to make fit" (see able). Related: Disabled; disabling. Earlier in the same sense was unable (v.) "make unfit, render unsuitable" (c. 1400).[disable etymology, disable origin, 英语词源]