Lewis Short
(adjective) : aeternābĭlis, e, aeterno
* That can last forever, everlasting: divitia, Att. ap. Non. 475, 24 (Trag. Rel. p. 143 Rib.): urbs, i. e. Rome, Cod. Th. 11, 20, 3 (cf. aeternus, II. A.).
Charlton T. Lewis, Charles Short, A Latin Dictionary