one fell swoop

慣用表現

(idiomatic) One stroke; one action or event that achieves or accomplishes many results.

日本語の意味

一挙に / 一気に / まとめて、一度に多くの結果を達成する行動や出来事

When the company announced the merger, they laid off hundreds of employees in one fell swoop.

会社が合併を発表したとき、彼らは何百人もの従業員を一挙に解雇した。

意味（1）

(idiomatic) One stroke; one action or event that achieves or accomplishes many results.

Changing the oil lubricates the engine and removes debris in one fell swoop.