“People in wheelchairs were living in this place, this is unforgivable,” says the father of a young caretaker in the movie.

But to choose the surest bait, and then to bring back no fish, is unforgivable.

Courtesy requires, no matter how unforgivable the offense, that an apology should be accepted.

I forgot the new and unforgivable grudge I had against him now.

It's an unforgivable offense in Miss Merton's eyes to walk into chapel after the service has begun.

He had gone into an inadvertent spin, the unforgivable sin in a flight test.