noun, na-adjective
quick and decisive; fast and daring
Describes acting with both speed and bold determination; often used in business, military, or leadership contexts.
彼の迅速果断な判断が会社を救った。
His quick and decisive judgment saved the company.
危機には迅速果断な行動が求められる。
In a crisis, quick and decisive action is required.
A yojijukugo composed of 迅速 (swift, rapid) and 果断 (decisive, resolute). The exact historical derivation is uncertain, but it follows a common pattern of combining two two-character compounds to form a four-character idiom.