nullify (v.)youdaoicibaDictYouDict[nullify 词源字典]
1590s, from Late Latin nullificare "to esteem lightly, despise," literally "to make nothing," from Latin nullus "not any" (see null) + root of facere "to make" (see factitious). Related: Nullified; nullifying.[nullify etymology, nullify origin, 英语词源]