1.
outrageous; unspeakable
An expression of strong condemnation, indicating that something is so bad or unacceptable that it is beyond description with words.
そのような行為は言語道断だ。
Such behavior is absolutely outrageous.
公金の横領は言語道断の行為である。
Embezzlement of public funds is an unspeakable act.
子供への虐待は言語道断だ。
Child abuse is absolutely unforgivable.
FOUR-CHARACTER IDIOM (四字熟語):
言語 (language, words) + 道断 (cutting off the path)
ORIGIN:
Originally a Buddhist term meaning a truth so profound that it cannot be expressed in words. The modern meaning has shifted to describe something so bad it defies description.
GRAMMAR:
Used as a na-adjective with だ/な or as a noun:
- 言語道断だ (is outrageous)
- 言語道断な行為 (outrageous act)
REGISTER:
Formal. Often used in serious contexts like news reports, official statements, or when expressing strong moral condemnation.
SIMILAR EXPRESSIONS:
- 許しがたい: unforgivable
- とんでもない: outrageous, absurd
- 論外: out of the question