instabilis

īn-stabilis e, adj.,

not steadfast, unsteady, unstable, tottering, not firm: ingressus, L.: cymbae, V.: naves, Cu.: acies, shaken, L.—Giving no support: tellus, O.—Fig., unstable, inconstant, changeable, fickle: instabilem motum habere, Cs.: coniugium, Iu.: animus, V.