Restrains

Here in a vast cavern king Aeolus rules over the struggling winds and howling tempests, and restrains them in prison with fetters.

They, in the rock reverberant held fast, / moan at the doors. Here, throned aloft, he reigns; / his sceptre calms their rage, their violence restrains: / else earth and sea and all the firmament / the winds together through the void would sweep.

She restrains the boy.

A fool does what they aren't capable of restraining themselves from doing; a wise person restrains themselves from doing what they aren't capable of.