Read the dictionary definition of restrain. All definitions for this word.
1. prevent the action or expression of
1. hold back your anger
2. keep your cool
3. she struggled to restrain her impatience at the delays
2. restrict (someone or something) so as to make free movement difficult
3. to close within bounds, or otherwise limit or deprive of free movement
1. This holds the local until the express passengers change trains
2. About a dozen animals were held inside the stockade
3. The illegal immigrants were held at a detention center
4. The terrorists held the journalists for ransom
4. prevent (someone or something) from doing something
1. security guards restrained the reporter from throwing another shoe