disaccustom (v.)youdaoicibaDictYouDict[disaccustom 词源字典]
late 15c., from Old French desacostumer "render unfamiliar" (Modern French désaccoutumer), from des- (see dis-) + acostumer (see accustom). Related: Disaccustomed.[disaccustom etymology, disaccustom origin, 英语词源]