ずんずん

ずんずん, ズンズンzunzun

adverb

  1. rapidly
  2. quickly
  3. briskly
  4. steadily
  5. by leaps and bounds
  6. booming (e.g. of a drum)

Study it in Yanamino

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