Horseback
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 10:40的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/horseback ref] From [https://en.wikipedia.org/wiki/Middle_English Middle English] horseba…”的新页面）
wiktionary
From Middle English horsebacke, horsebak, horsbak, equivalent to horse + back.
etymonline
horseback (n.)
"the back of a horse," especially the part upon which a rider sits, late 14c., from horse (n.) + back (n.). The alternative formerly was described in jest as footback [Century Dictionary].
