Meaning of “restrain” - Learner’s Dictionary

restrain

verb [ T ] uk us /rɪˈstreɪn/
CONTROL SOMEONE

to stop someone doing something, sometimes by using force:

He became violent and had to be physically restrained.
[ + from + doing sth ] I had to restrain myself from shouting at him.
LIMIT

to limit something:

to restrain arms sales

(Definition of “restrain” from the Cambridge Learner’s Dictionary © Cambridge University Press)