Inexpiable
Pronunciation : In*ex"pi*a*ble
Part of Speech : a.
Etymology : [L. inexpiabilis: cf. F. inexpiable. See In- not, and Expiable.]
Definition : 1. Admitting of no expiation, atonement, or satisfaction; as, an inexpiable crime or offense. Pomfret.
2. Incapable of being mollified or appeased; relentless; implacable. [Archaic] "Inexpiable hate." Milton. They are at inexpiable war with all establishments. Burke.
Source : Webster's Unabridged Dictionary, 1913