Lewis Short
(adj.adv.) : mūtābĭlis, e, adj.muto
* Changeable, mutable (class.): omne corpus mutabile est,Cic. N. D. 3, 12, 30: sidera quae vaga et mutabili erratione (al. ratione) labuntur,id. Univ. 10: forma civitatis,id. Rep. 2, 23, 43: varium et mutabile semper Femina,an inconstant thing,Verg. A. 4, 569: animus vulgi,Liv. 2, 7.—Comp.: quid inconstantius, aut mutabilius?Val. Max. 6, 19, 14.—Sup.: mutabilissimae deorum voluntates, Porcius Latro decl. in Catil. 16.—Hence, adv.: mū-tābĭlĭter, changeably (ante-class.): mutabiliter avet, Varr. ap. Non. 139, 26.
Charlton T. Lewis, Charles Short, A Latin Dictionary