シュッシュッ

シュッシュッ, しゅっしゅっshusshu

adverb

  1. choo-choo
  2. chug-chug
  3. chuff-chuff
  4. hiss-hiss
  5. brush-brush
  6. scrub-scrub

Study it in Yanamino

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