credo (n.)youdaoicibaDictYouDict[credo 词源字典]
late 12c., from Latin, literally "I believe," first word of the Apostles' and Nicene Creeds, first person singular present indicative of credere "to believe," from PIE compound *kerd-dhe- "to believe," literally "to put one's heart" (cognates: Old Irish cretim, Irish creidim, Welsh credu "I believe," Sanskrit śrad-dhā- "faith"), from PIE root *kerd- (1) "heart" (see heart (n.)). The nativized form is creed. General sense of "formula or statement of belief" is from 1580s.[credo etymology, credo origin, 英语词源]