Teacher
来自Big Physics
Safin（讨论 | 贡献）2022年4月26日 (二) 22:24的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/teacher ref] From [https://en.wikipedia.org/wiki/Middle_English Middle English] techere,…”的新页面）
wiktionary
From Middle English techere, equivalent to teach + -er. More at teach.
etymonline
teacher (n.)
"one who teaches," c. 1300; agent noun from teach (v.). It was used earlier in a sense of "index finger" (late 13c.). Teacher's pet attested from 1856.
