Lewis Short
(adjective) : immūtābĭlis (inm-), e, 2. in-mutabilis
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary
Lewis Short
(adjective) : immūtābĭlis (inm-), e, immuto
* Changed, altered: vestitus atque ornatus,Plaut. Epid. 4, 2, 8.—Comp.: immutabiliores animae,Cassiod. de Anim. 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary