early 13c., from O.Fr. departir, from L.L. departire "divide" (transitive), from de- "from" + partire "to part, divide," from pars (gen. partis) "a part." As a euphemism for "to die" (to depart this life) it is attested from c.1500. Transitive in Eng. lingers in some senses; the wedding service was till death us depart until 1662.