c. 1200, deliveren, "save, rescue, set free, liberate," from Old French delivrer "to set free; remove; save, preserve; hand over (goods)," also used of childbirth, from Late Latin deliberare, from de "away" (see de-) + Latin liberare "to free," from liber "free, unrestricted, unimpeded" (see liberal (adj.)).
The sense of "to bring (a woman) to childbirth," in English is from c. 1300. Sense of "hand over, give, give up, yield" is from c. 1300 in English, which is in opposition to its etymological sense. Meaning "to project, cast, strike, throw" is from c. 1400. Related: Delivered; delivering.