Her arguments seemed 'impregnable'.
an 'impregnable' reputation
an 'impregnable' fortress
(..) by the sea and ended beneath one of the main guard towers. No better place for low pursuits than beneath the ground. Casterly Rock is an impregnable fortress. ( grunts, wheezes ) But as a good friend of mine once said, "Give me good men and I'll impregnate the bitch." - ( grunting ) (..)2017 TvShow: Game of Thrones Title: The Queen's Justice Season: 7 Episode 3
(..) men at least. They will see us coming. They will be ready. ( men shouting ) - Man: Draw! Loose! - Man #: Loose! Tyrion: The gates of Casterly Rock are impregnable. ( men grunting ) The fight up the walls will be hard. We will be at a disadvantage. - ( grunts ) - Many men will die. Just as my father (..)2017 TvShow: Game of Thrones Title: The Queen's Justice Season: 7 Episode 3