in one fell swoop

US /ɪn wʌn fɛl swuːp/
UK /ɪn wʌn fɛl swuːp/
"in one fell swoop" picture
1.

一挙に, 一度に

all at once; in a single action or event

:
He lost all his money in one fell swoop.
彼は一挙に全財産を失った。
The new policy addressed several issues in one fell swoop.
新しい政策は一挙にいくつかの問題に対処した。