adverb

  1. before one knows, before one becomes aware of, unnoticed, unawares.

Variations

Pronunciation Kanji Kana Is Common
 
 
 
 
 
いつの間にか いつのまにか
何時
 
 
 
何時の間にか いつのまにか

Contained Kanji Breakdown

interval, space
ま カン ケン (2nd, N5)
gate, counter for cannons
モン かど と (2nd, N2)
day, sun, Japan
ひ にっ ニチ (1st, N5)