Found 2 items, similar to unpardonable.
English → English (WordNet) Definition: unpardonable unpardonable adj : not admitting of pardon; “unpardonable behavior” [ant: pardonable]
English → English (gcide) Definition: Unpardonable Unpardonable \Un*par"don*a*ble\, a. Not admitting of pardon or forgiveness; inexcusable. [Webster 1913 Suppl.]