Not remissible; for or of which there is no remission. That cannot be forgiven; unpardonable.

Of a crime, a sense of shame, etc.: that cannot be cleansed or purged. Also in literal sense: impossible to clean.

Not to be pardoned, unpardonable.

That cannot be pardoned or forgiven; inexcusable, reprehensible.

Not excusable; incapable of being excused or justified. Of persons.

(un-, prefix1 affix 1b)

= inexcusable, adj.. Of faults, offences, etc.

Without pardon; unpardonable, unforgivable.

Of an offence: That cannot be expiated or atoned for; of which the guilt cannot be done away.

Not capable of being remitted; = irremissible, adj.

= irremissible, adj.

For which no satisfaction can be made. Obsolete.

= inexpiable, adj. 1.

Of things: Admitting of no excuse; inexcusable.

Inexcusable.

Originally: †Without excuse or justification, inexcusable (obsolete). Later: without pretence or pretension.

That cannot be atoned for or expiated.