Godan verb, transitive verb

  1. to sit up late.

Variations

Pronunciation Kanji Kana Is Common
 
 
更かす ふかす

Contained Kanji Breakdown

grow late, night watch, sit up late
さら コウ ふ.ける (7th, N3)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
day, sun, Japan
ひ にっ ニチ (1st, N5)
mow, cut grass, subdue
ガイ ゲ おさ.める (Kentei 1)