trendyoudaoicibaDictYouDict[trend 词源字典]
trend: [OE] The etymological notion underlying trend is of ‘circularity’ or ‘roundness’. It comes from a prehistoric Germanic base *trend-, *trund-, which also produced Dutch trent ‘circumference’, Swedish trind ‘round’, and English trundle [16], and it was originally used in the sense ‘revolve, roll’. This gradually evolved via ‘turn’ to, in the 16th century, ‘turn in a particular direction, take a particular course’. The first record of the derivative trendy dates from 1962.
=> trundle[trend etymology, trend origin, 英语词源]
trend (v.)youdaoicibaDictYouDict
1590s, "to run or bend in a certain direction" (of rivers, coasts, etc.), from Middle English trenden "to roll about, turn, revolve," from Old English trendan "turn round, revolve, roll," from Proto-Germanic *trandijan (cognates: Old English trinde "round lump, ball," Old Frisian trind, Middle Low German trint "round," Middle Low German trent "ring, boundary," Dutch trent "circumference," Danish trind "round"); origin and connections outside Germanic uncertain. Sense of "have a general tendency" (used of events, opinions, etc.) is first recorded 1863, from the nautical sense. Related: Trended; trending.
trend (n.)youdaoicibaDictYouDict
"the way something bends" (coastline, mountain range, etc.), 1777, earlier "round bend of a stream" (1620s), from trend (v.); sense of "general course or direction" is from 1884. Sense of "a prevailing new tendency in popular fashion or culture" is from c. 1950.