Word Origin & History
mortal (adj.)
c.1368, "deadly," also "doomed to die" (c.1374), from O.Fr. mortel "destined to die," from L. mortalis "subject to death," from mors (gen. mortis) "death," from PIE base *mor-/*mr- "die" (cf. Skt. mrtih "death," Avestan miryeite "dies," O.Pers. martiya- "man," Lith. mirtis "mortal man," Gk. ambrotos "immortal," O.C.S. mrutvu "dead," O.Ir. marb, Welsh marw "died," O.E. morþ "murder"). The noun meaning "mortal thing or substance" is first recorded 1526. Mortality "condition of being mortal" is attested from 1340. In the sense of "loss of life on a large scale" it is from c.1400; as "number of deaths in a given period" it is first recorded 1645.