いつの間にか

Before one knows it; unnoticed

Readings

Other forms

何時の間にか less common kanji form

Adverb

Before I knew it" / "Unnoticed

Indicates that a change or event occurred imperceptibly without the speaker realizing the exact moment it happened.

Example

映画を見ていたら、いつの間にか寝てしまった。

I fell asleep before I knew it while watching the movie.

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VOCAB 2 / 30

いつの間にか

いつのまにか

Before one knows it; unnoticed

Example

この言葉を覚えましょう。

Let's memorize this word.

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