mort (n.1)

"girl, woman" (chaste or not, but especially one of roaming tendencies or loose morals), 1560s, canting jargon, and like most of it of unknown origin and no etymology.

in hunting, "a flourish sounded on a horn at the death of the quarry, c. 1500, from Old French mort "dead," from Latin mortem (source also of Spanish muerte, Italian morte), accusative of mors "death" (from PIE root *mer- "to rub away, harm," also "to die" and forming words referring to death and to beings subject to death). Or the French word might be from Vulgar Latin *mortus, from Latin mortuus, from the same PIE root. Mort was used earlier in Middle English as "death" (c. 1300).