in·expiable \(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