instep
US /ˈɪn.step/
UK /ˈɪn.step/

名詞
1.
甲, 足の甲
the part of a person's foot between the toes and the ankle, where the arch is highest
例:
•
He kicked the ball with the instep of his foot.
彼は足の甲でボールを蹴った。
•
The shoe was too tight across the instep.
靴は甲の部分がきつすぎた。
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