(いっとうりょうだん)

いっとうりょうだん
noun / na-adjective
cutting in two with one stroke; decisive action
1. cutting something in two with a single stroke; making a clean, decisive judgment
A four-character compound (四字熟語) describing the act of resolving something swiftly and decisively, like cutting through an object with one stroke of a sword. Often used with する to describe making a bold, unequivocal decision or dismissal.
社長(しゃちょう)一刀両断(いっとうりょうだん)()めた。
The company president made a decisive ruling.
その提案(ていあん)一刀両断(いっとうりょうだん)退(しりぞ)けられた。
The proposal was flatly rejected.
(かれ)問題(もんだい)一刀両断(いっとうりょうだん)(かた)づけるタイプだ。
He's the type who settles problems decisively.

A 四字熟語(よじじゅくご) (four-character idiom) literally meaning 'cutting in two with one sword.' Used figuratively for swift, decisive action or judgment.

ETYMOLOGY:
一刀(いっとう) (one sword stroke) + 両断(りょうだん) (cutting in two). Originally from Chinese.

GRAMMAR:

  • 一刀両断(いっとうりょうだん)に + verb: adverbially (most common)
  • 一刀両断(いっとうりょうだん)する: as a suru-verb
  • 一刀両断(いっとうりょうだん)な + noun: as a na-adjective

COMMON PATTERNS:

  • 一刀両断(いっとうりょうだん)()()てる: to cut down decisively
  • 一刀両断(いっとうりょうだん)退(しりぞ)ける: to flatly reject
  • 一刀両断(いっとうりょうだん)片付(かたづ)ける: to settle decisively

NUANCE:
Usually positive, suggesting leadership and decisiveness. However, it can imply being overly blunt or dismissive when the decision affects others.