グースカ

グースカ, ぐーすか, ぐうすかguusuka

adverb

  1. soundly (of sleeping)
  2. (sleeping) like a log

Study it in Yanamino

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