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heel (of foot, shoe, stocking, etc.)
靴のかかとがすり減って歩きにくくなった。
The heels of my shoes wore down and became hard to walk in.
かかとの高い靴を履くと足が痛くなる。
My feet hurt when I wear high heels.
彼女はかかとを踏まれて思わず声を上げた。
She involuntarily cried out when her heel was stepped on.