グースカ
gū suka

Adverb

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

Onomatopoeia
「おはよう。今日 きょう はやいね」「アナタこそ、まだぐうすか てると おもってたのに」
"ohayō. kyōwa hayaine" "anatakoso mada gūsuka neteruto omottetanoni"
"Morning. You're early today." "You too. I thought you'd still be dead to the world."
Other forms: