English to English

adverb (r)

• without delay or hesitation; with no time intervening

  tanpa penundaan atau keraguan; tanpa waktu campur tangan

  Synonym:
  at once, directly, forthwith, immediately, instantly, like a shot, now, straight off, straightaway
  

  source: wordnet30
• at once (usually modifies an undesirable occurrence)

  sekaligus (biasanya mengubahsuai sebuah kejadian tidak disukai)

  source: wordnet30