prevalent (adj.)youdaoicibaDictYouDict[prevalent 词源字典]
early 15c., "having great power or force," from Latin praevalentem (nominative praevalens) "of superior strength; mighty," present participle of praevalere "to be more able" (see prevail). Meaning "extensively existing, in general use" is from 1650s.[prevalent etymology, prevalent origin, 英语词源]