Within
来自Big Physics
Safin(讨论 | 贡献)2022年4月26日 (二) 21:48的版本 (建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=within+etymology&newwindow=1&hl=en ref] late Old English withinnan ‘on the inside’.…”的新页面)
late Old English withinnan ‘on the inside’.
wiktionary
From Middle English withinne, withinnen, from Old English wiþinnan; equivalent to with + in.
etymonline
within (adv., prep.)
Old English wiðinnan "within, from within," literally "against the inside," see with + in.