Webster's Revised Unabridged Dictionary · 1913

Disengage

Disengage ({not transcribed}) , transitive verb

[Prefix dis- + engage: compare French désengager.]

To release from that with which anything is engaged, engrossed, involved, or entangled; to extricate; to detach; to set free; to liberate; to clear; as, to disengage one from a party, from broils and controversies, from an oath, promise, or occupation; to disengage the affections a favorite pursuit, the mind from study.
To disengage him and the kingdom, great sums were to be borrowed. — Milton
Caloric and light must be disengaged during the process. — Transl. of Lavoisier

Disengage , intransitive verb

To release one's self; to become detached; to free one's self.
From a friends's grave how soon we disengage! — Young