Sideline
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 09:39的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/sideline ref] side + line == etymonline == [https://www.etymonline.com/word/sideli…”的新页面）
wiktionary
side + line
etymonline
sideline (n.)
also side-line, "line on the side of a fish," 1768; "lines marking the limits of playing area" (on a football field, etc.), 1862, from side (adj.) + line (q.v.). Meaning "course of business aside from one's regular occupation" is from 1890. Railway sense is from 1890. The figurative sense of "position removed from active participation" is attested from 1934 (from the railway sense or from sports, because players who are not in the game stand along the sidelines). The verb meaning "put out of play" is from 1945. Related: Sidelined; sidelining.
