per·ma·nent / ˈpərmənənt/ • adj. lasting or intended to last or remain unchanged indefinitely: a permanent ban on the dumping of radioactive waste at sea damage was not thought to be permanent some temporary workers did not want a permanent job. ∎  lasting or continuing without interruption: he's in a permanent state of rage.• n. a perm for the hair.DERIVATIVES: per·ma·nent·ize / -ˌtīz/ v. ( rare )per·ma·nent·ly adv.

permanent XV. — (O)F. permanent or L. permanēns, -ent-, prp. of permanēre remain to the end, f. PER- + manēre remain.
So permanence XV. — (O)F. or medL.