Foot, Leg, Sufficient
The radical for foot and the kanji for foot are exactly the same. That being said, there's also 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 if you hop.
Same kanjis and radicals make Jack a happy boy. You should also learn the other meaning as well, though, if you can.
そく
あし, た
None
What do you wear on your foot? You wear a sock (そく).
Just think about your bare feet. Think about them too much. Feel how cold it is on your feet. Now, put on a sock to make it feel better. Ahhh, so nice!