Irrefutable
Pronunciation : Ir`re*fut"a*ble
Part of Speech : a.
Etymology : [L. irrefutabilis: cf. F. irr?futable. See Refute.]
Definition : Defn: Incapable of being refuted or disproved; indisputable. -- Ir`re*fut"a*ble*ness, n. -- Ir`re*fut"a*bly, adv.
Source : Webster's Unabridged Dictionary, 1913