c.1300, "to make (someone) an heir," from Old French enheriter "make heir, appoint as heir," from Late Latin inhereditare "to appoint as heir," from Latin in- "in" (see in-(2)) + hereditare "to inherit," from heres (genitive heredis) "heir" (see heredity). Sense of "receive inheritance" arose mid-14c.; original sense is retained in disinherit. Related: Inherited; inheriting.