inexpiable

adj

Etymology: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English in- English expiable English inexpiable From in- + expiable.

1. That cannot be expiated or atoned for; unforgivable.

   “[…] the only son of that disgraced and blood-stained nobleman, who, lying in gaol, under sentence of death for a foul and cowardly murder, swallowed poison, and so closed his guilty life with a tremendous crime, in its nature inexpiable.”