mid-15c., apparently from in + step, "though this hardly makes sense" [Weekley]. An Old English word for "instep" was fotwelm. Middle English also had a verb instep "to track, trace" (c. 1400).
雙語例句
1. The machine apply for leather handbags or instep folding turn edging.
該機(jī)適合皮革、皮包、鞋面折邊、翻邊.
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2. Leather upper features straps over the instep for support.
在皮革上的支持腳背功能松緊帶.
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3. Does urine blister grow on infantile back of hand, instep?
嬰兒手背 、 腳背上長小水皰?
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4. This machine can mold the joint point and instep point simultaneously.