one fell swoop

Meaning

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

Translations

de cop i volta

tot de cop

in einem Rutsch

mit einem Schlag

d'un seul coup

de repente

aniden

ansızın

birdenbire

Etymology

After Shakespeare, in Macbeth, act iv, scene 3, where Macduff learns his wife and entire family are murdered:
: Ro. Wife, Children, Servants, all that could be found. […]
: Macd. […] All my pretty ones?
Did you say All? Oh Hell-Kite! All?
What, All my pretty Chickens, and their Damme
At one fell swoope?
The imagery is of a bird of prey ("hell-kite") ransacking a whole nest at one blow, fell meaning "terrible, cruel, savage." In later uses of the expression, the force of the metaphor is reduced or lost.