irremissible
/ɪrɪˈmɪsɪb(ə)l
/adjective
1(Of a crime) unpardonable.The discussion of the divine Trinity, the issue of irremissible sin and the treatment of Montanist oracles demonstrate that Tertullian re-creates and modifies the ideas of Montanism.
2(Of an obligation or duty) binding.What irremissible demands, according to Canetti, must be made upon the truly representative man?
Origin
Late Middle English: from Old French, or from ecclesiastical Latin irremissibilis, from in- 'not' + remissibilis (from remittere 'remit').