unforgivable

That one belongs in a category of its own and given the unbearable, unforgivable and entirely avoidable human tragedy involved, offers no opportunity for humor.

“The city’s conscious decisions to leave its reservoir dry and its power on are simply unforgivable,” said Jeffrey Boozell, another attorney for the plaintiffs.

"Your dereliction of duty is unforgivable," he said.

"It's bad enough that other trusts didn't listen, but for it to happen again in this same trust is unforgivable."

After attending a private meeting of Labour MPs last week, one MP told the BBC that freezing PIP would be "unforgivable".