Indefeasible
Pronunciation : In`de*fea`si*ble
Part of Speech : a.
Etymology : [Pref. in- not + defeasible: cf. OF. indefaisable.]
Definition : Defn: Not to be defeated; not defeasible; incapable of being annulled or made void; as, an indefeasible or title. That the king had a divine and an indefeasible right to the regal power. Macaulay.
Source : Webster's Unabridged Dictionary, 1913