すかさず

すかさずsukasazu

adverb

  1. without a moment's delay
  2. at once
  3. immediately
  4. instantly
  5. promptly
  6. without hesitation

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences