• (a.) Admitting of no expiation, atonement, or satisfaction; as, an inexpiable crime or offense. • (a.) Incapable of being mollified or appeased; relentless; implacable. Found on http://thinkexist.com/dictionary/meaning/inexpiable/
In·ex'pi·a·ble adjective [ Latin inexpiabilis : confer 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... Found on http://www.encyclo.co.uk/webster/I/51