すくすく

すくすくsukusuku

adverb

  1. (growing) quickly (esp. children, plants)
  2. (developing) quickly
  3. fast
  4. rapidly

Study it in Yanamino

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