unhitch

To release from a hitch.

To unfasten or disconnect.

To disengage from a hitch or fastening; set free; unfasten: as, to unhitch a horse.

To free from being hitched, or as if from being hitched; to unfasten; to loose.

To disconnect; to detach; to undo that which is hitched.

unfasten or release from or as if from a hitch