congruence (n.)youdaoicibaDictYouDict[congruence 词源字典]
mid-15c., from Latin congruentia "agreement, harmony, congruity," from congruentem (nominative congruens), present participle of congruere "to come together" (see congruent). Related: Congruency.[congruence etymology, congruence origin, 英语词源]