التزم

Verb

 * 1) to, to keep to [+ بِ (object)]
 * 2) to make oneself responsible for, to take over as a duty specific to oneself
 * 3) to  oneself to
 * 4) to take over as a
 * 5) to be responsible for, to have the particular duty of, to be bound to

Etymology
From.

Verb

 * 1)  to commit