deduct (v.)youdaoicibaDictYouDict[deduct 词源字典]
early 15c., from Latin deductus, past participle of deducere "lead down, bring away;" see deduce, with which it formerly was interchangeable. Technically, deduct refers to taking away portions or amounts; subtract to taking away numbers. Related: Deducted; deducting.[deduct etymology, deduct origin, 英语词源]