disengage (oneself) from someone or something
to detach oneself from someone or something; to untangle oneself from someone or something. I wanted to disengage myself from the person I was talking to and go home. We disengaged from the argument.
disengage something from something
to detach something from something. Sally disengaged the locking mechanism from the cupboard door and peeked in. The coupling was disengaged from the boxcar, and the car separated and rolled away.