Dictionary / Vocabulary / 言語道断
ごんごどうだん
outrageous; preposterous; scandalous; inexcusable
Also written 言語同断、言語道斷
それは出来ない相談だな。油物してる時に、火の傍から離れるのは言語道断だ。
I'm afraid I can't do that. Leaving the cooker while frying is completely out of the question.
きみの言語道断な行いを恥ずかしいと思う。
I am ashamed of your despicable deed.
それは言語道断だ。
That is out of the question.