UNPUNISHED

[adjective] [after verb; not gradable] - not punishedIf a referee allows a foul like that to go unpunished he's asking for trouble.It might be his first offence but if people like him go unpunished it sets a bad example to others. unputdownable [adjective] [informal] - (of a book) so exciting that you do not want to stop reading it"Was it a good read?" "Oh, totally unputdownable - I read it solidly for two whole days."