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foot; paw; arm (of an octopus, squid, etc.)
leg
gait
pace
means of transportation; (one's) ride
lower radical of a kanji
money; coin
「足」 has another reading with different meanings.
足が痛くて歩けない。
My foot hurts and I can't walk.
足を伸ばして休みましょう。
Let's rest with legs stretched.
毎日走っているから足が強くなった。
I've been running every day, so my legs have gotten stronger.