rivalyoudaoicibaDictYouDict[rival 词源字典]
rival: [16] A rival is etymologically ‘someone who uses the same stream as another’. The word comes from Latin rīvālis, a noun use of an adjective meaning ‘of a stream’, derived from rīvus ‘stream’ (source of English derive). People who use or live by the same stream are neighbours and hence, human nature being as it is, are usually in competition with each other – hence rival.
=> derive[rival etymology, rival origin, 英语词源]
rival (n.)youdaoicibaDictYouDict
1570s, from Latin rivalis "a rival, adversary in love; neighbor," originally, "of the same brook," from rivus "brook" (see rivulet). "One who is in pursuit of the same object as another." The sense evolution seems to be based on the competitiveness of neighbors: "one who uses the same stream," or "one on the opposite side of the stream" A secondary sense in Latin and sometimes in English was "associate, companion in duty," from the notion of "one having a common right or privilege with another." As an adjective 1580s from the noun.
rival (v.)youdaoicibaDictYouDict
c. 1600, from rival (n.). Related: Rivaled; rivaling.