(ˈ)in, ən+ adjective
Etymology: Latin inexpiabilis, from in- in- (I) + expiare to expiate + -abilis -able — more at expiate
1. : not capable of being expiated or atoned for : unforgivable
inexpiable offense
2. obsolete : implacable , unappeasable
• in·ex·pi·a·ble·ness -nə̇s noun -es
• in·ex·pi·a·bly -blē, -bli adverb