to keep (something) under control; to repress or check (a feeling)
(usu + from) to prevent (somebody) from doing something
They restrained the boy from jumping
to hold onto and physically prevent (a person or animal) from moving, attacking, etc
to deprive (somebody) of liberty, esp by placing them under arrest
restrainable adj
restrainer noun
[Middle English restraynen via early French restraindre from Latin restringere to restrain, restrict, from re- + stringere to bind tight]