Foot
Sufficient, Leg
The radical for foot and the kanji for foot are exactly the same.
That said, there's another meaning you should keep in mind, which is sufficient. If you think about it, one foot should be sufficient enough to walk around with. You'd have to hop, but one foot is definitely still sufficient.
そく
あし, た
None
What do you wear on your foot? You wear a sock (そく).