an unpardonable sin entailing a total loss of grace; theologians list 7 mortal sins.
The judge found him guilty of unpardonable evil.
Euthanasia is a special kind of unpardonable crime in the name of charity, guilty up to the hilt!
But in such cases as these, a good memory is unpardonable.
In court for unpardonable anti-Semitic remarks, which cost him his job at Dior in 2011, the designer admitted to alcohol abuse.
The one unpardonable sin of nature is to stand still, to stagnate.
North Korea angrily denied the reports, calling them an "unpardonable" crime.
