The Collaborative International Dictionary
Undeterminable
Undeterminable \Un`de*ter"mi*na*ble\, a.
Not determinable; indeterminable.
--Locke.
Wiktionary
undeterminable
a. not possible to determine
WordNet
undeterminable
adj. not capable of being definitely decided or ascertained [syn: indeterminable] [ant: determinable]