Word Study
unprovable
OXFORD DICTIONARY
unprovable, adj. that cannot be proved.
Derivative
unprovability n. unprovableness n.
THESAURUS
unprovable
agnostic, ambiguous, capricious, chancy, changeable, controvertible, dicey, doubting, equivocal, erratic, fickle, hesitant, hesitating, incalculable, indecisive, indemonstrable, irresolute, polysemous, skeptical, touch-and-go, unaccountable, unattestable, uncertain, unconfirmable, unconvinced, undemonstrable, undemonstratable, undivinable, unforeseeable, unpersuaded, unpredictable, unsubstantiatable, unsupportable, unsure, unsustainable, unverifiable, variable, wavering, whimsicalFor further exploring for "unprovable" in Webster Dictionary Online