unascertainable

unascertainable

(ˌʌnæsəˈteɪnəbəl) adjnot able to be ascertained, discovered, or made certain

Thesaurus

Adj.

1.

unascertainable - not able to be ascertained; resisting discoveryundiscoverableindeterminable, undeterminable - not capable of being definitely decided or ascertained