I.unchangeable, unalterable, immutable (rare but class.): “esse causas immutabiles easque aeternas,” Cic. Fat. 12, 28; so, “immutabilis et aeterna res,” id. Rep. 3, 2: “nec magis immutabile ex vero in falsum,” id. Fat. 9, 18: “res (with stabilis),” id. Univ. 3: “comprehensio (with stabilis),” id. Ac. 2, 8, 23: “spatia,” id. N. D. 2, 19, 49: “eadem ratio, quae fuit futuraque, donec res eaedem manebunt, inmutabilis est,” Liv. 22, 39, 10: “necessitas,” Quint. 2, 13, 1: “pondus verborum (with grave),” Stat. Th. 1, 212.— Comp.: “concordi populo nihil esse immutabilius, nihil firmius,” Cic. Rep. 1, 32.—Adv.: immūtābĭlĭter , unchangeably, Dig. 45, 1, 99, § 1; App. de Mundo, p. 74.
immūtābĭlis (inm- ), e, adj. 2. in-mutabilis,