de·part / diˈpärt/ • v. [intr.] leave, typically in order to start a journey: they departed for Germany a contingent was departing from Cairo. ∎  (depart from) deviate from (an accepted, prescribed, or traditional course of action): he departed from the precedent set by many.PHRASES: depart this life archaic die.

depart †divide into parts, distribute; †sunder, separate XIII; go away XIII; leave, quit XIV; die XVI. — (O)F. départir, †des- :- Rom. *dē-, *dispartīre, for L. dispertīre divide; see DE- 2, DIS- 1, and PART.
So department separately allotted province, division, or part. XVIII. departure †separation; going away, setting out; deviation. XV.