约束 (yuē shù): to restrain, to bind

To protect her child's eyesight, the mother strictly restricts his daily phone time.

This company uses strict rules to restrict employees, forbidding them from leaking client information.

Although the doctor repeatedly restricted him to eat less sweets, he still couldn't resist eating two pieces of cake.

In public places, we should use social morality to restrict our behavior and not speak loudly.