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all at once adverb

  /ˌɑl ət ˈwʌn(t)s/ , /ˌɔl ət ˈwʌn(t)s/ , /ˌɔːl ət ˈwʌn(t)s/
  • (idiomatic) Unexpectedly; without warning; all of a sudden.
 d'un coup d'un seul, soudain, tout d'un coup
  • Used other than figuratively or idiomatically: see All at the same time; all together.
 d'un seul coup
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