declare (v.)youdaoicibaDictYouDict[declare 词源字典]
early 14c., from Old French declarer "explain, elucidate," or directly from Latin declarare "make clear, reveal, disclose, announce," from de- intensive prefix (see de-) + clarare "clarify," from clarus "clear" (see clear (adj.)). Related: Declared; declaring.[declare etymology, declare origin, 英语词源]