irremissibilis

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

irrĕmissĭbĭlis (inr-), e, adj. [2. inremissibilis],

unpardonable , irremissible (eccl. Lat.): peccata, Tert. Pudic. 2: blasphemia, Hier. Ep. 42, 1.