Word Origin & History
trend (v.)
1598, "to run or bend in a certain direction" (of rivers, coasts, etc.), from M.E. trenden "to roll about, turn, revolve," from O.E. trendan, from P.Gmc. *trandijanan (cf. O.E. trinde "round lump, ball," O.Fris. trind, M.L.G. trint "round," M.L.G. trent "ring, boundary," Du. trent "circumference," Dan. trind "round"); origin and connections outside Gmc. uncertain. Sense of "have a general tendency" (used of events, opinions, etc.) is first recorded 1863, from the nautical sense. The noun meaning "the way something bends" (coastline, mountain range, etc.) is recorded from 1777; sense of "general tendency" is from 1884. Trend-setter first attested 1960; trendy is from 1962.
[trend] 
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