Inexpiable
Inexpiable , adjective
[Latin inexpiabilis: compare French inexpiable. See In- not, and Expiable.]
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.
They are at inexpiable war with all establishments.