dis·en·gage 
(dĭs′ĕn-gāj)
(dĭs′ĕn-gāj)v. dis·en·gaged, dis·en·gag·ing, dis·en·gag·es
v.tr.
1. To release from something that holds fast, connects, or entangles. See Synonyms at extricate.
2. To release (oneself) from an engagement, pledge, or obligation.
v.intr.
To free or detach oneself; withdraw.
dis′en·gagement n.