This is the 9871st most frequent Japanese word.
言語道断
"言語道断" means "outrageous" or "beyond words; absurd."
The word '言語道断' is used to describe something beyond comprehension or entirely unacceptable.
彼の行動は言語道断だ。
His behavior is outrageous.
Here, '言語道断' conveys strong criticism towards harmful actions or policies.
その会社が環境を汚染しているのは言語道断だ。
It's outrageous that the company is polluting the environment.
In this sentence, '言語道断' expresses indignation at behavior considered highly inappropriate.