他要约束自己。
He should restrain himself.
to restrict; to limit to; to constrain
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
他要约束自己。
He should restrain himself.
这个规定是一种约束。
This rule is a constraint.