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Adverb: instantaneously  ,in-stun'tey-nee-us-lee
  1. Without delay or hesitation; with no time intervening
    "he answered instantaneously";
    - immediately, instantly, straightaway, straight off, directly, now, right away, at once, forthwith, like a shot [informal], right off the bat [N. Amer, informal], outright, in a flash, tout de suite