Some transgressions are perceived as being so serious that they are considered unforgivable. Michael commits the apparently unforgivable gaffe of expressing his condolences to Gabi's mother. King says that Ajay's mistake is unforgivable. It is not, however, an unforgivable sin. Bill asks for forgiveness, but Billy refuses, saying his actions are unforgivable. Incensed, she wrote to the national newspapers, decrying what she considered unforgivable treatment. Rousseau's unforgivable crime was his rejection of the graces and luxuries of civilized existence. The Unforgivable Curses are some of the most powerful known Dark Arts spells. Believing she has done something unforgivable, Polly retreats to her flat in anguish. Reyna is reluctant to discuss the incident because patricide is "unforgivable" in New Rome. To me, that is totally unforgivable. He does something to her that is almost unforgivable. Fuu, however, thinks that his abandoning the family was unforgivable. Kensit said that "he's done the most unforgivable thing". The Iranian president described the missile attack as an unforgivable error.