disallow (v.)youdaoicibaDictYouDict[disallow 词源字典]
late 14c., "to refuse to praise," from Old French desalouer "to blame," from des- (see dis-) + alouer (see allow); meaning "to reject" is from 1550s. Related: Disallowed; disallowing; disallowance.[disallow etymology, disallow origin, 英语词源]