Upbeat
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 16:32的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/upbeat ref] up- + beat == etymonline == [https://www.etymonline.com/word/upbeat re…”的新页面）
wiktionary
up- + beat
etymonline
upbeat (adj.)
"with a positive mood," 1947, apparently from on the upbeat "improving, getting better," attested from 1934 and a favorite of Billboard magazine headline-writers in the early 1940s, from the musical noun upbeat (1869), referring to the beat of a bar at which the conductor's baton is in a raised position; from up (adv.) + beat (n.). The "optimistic" sense apparently for no other reason than that it sounds like a happy word (the musical upbeat is no more inherently "positive" than any other beat).
