Unanswerable
Pronunciation : Un*an"swer*a*ble
Part of Speech : a.
Definition : Defn: Not answerable; irrefutable; conclusive; decisive; as, he have an unanswerable argument. -- Un*an"swer*a*ble*ness, n. -- Un*an"swer*a*bly, adv.
Source : Webster's Unabridged Dictionary, 1913