Also, jukugo of 足 tend to be KUNKUN, rather than ON-ON.
A mouth yelling "Stop right now and put a damn SOCK on your foot!!! You'll catch cold running around like that!! Do you know what kind of germs are on the ground?? do you know what kind of people have been here????!"
|( が ) た＊りる||
to be enough. Often used in the negative. XXXが足りない!
means foot AND leg. Oops. They don't have a separate word.
To not have enough of a physical thing (money, time, nurses, teachers.) Also implies that there is a specific amount that is required, For example -犬不足 (a dog shortage). There's no particle or verb needed.