Composed of 論 (discussion, argument) + 外 (outside) — literally "outside discussion." Used to dismiss something as not even worth debating. Functions as a noun and as a na-adjective (論外な).
Common collocations
- 論外だ: is out of the question
- 論外な話: an absurd proposition
Similar words
- 問題外: out of the question — nearly synonymous, equally dismissive
- 言語道断: outrageous; unspeakable — stronger, conveys moral outrage as well