all at once in French
all at once in French
d'un coup d'un seul
(idiomatic) Unexpectedly; without warning; all of a sudden.
soudain
(idiomatic) Unexpectedly; without warning; all of a sudden.
tout d'un coup
(idiomatic) Unexpectedly; without warning; all of a sudden.
d'un seul coup
Used other than figuratively or idiomatically: see All at the same time; all together.