夜更(よふ)けlate at night

夜更(よふ)けは外(そと)が真(ま)っ暗(くら)です。

The outside is pitch black late at night.

幽霊(ゆうれい)がよく出(で)る時間(じかん)帯(たい)は夜更(よふ)けである。

Ghosts often appear late at night.

夜更(よふ)けに外(そと)を一人(ひとり)で歩(ある)き回(まわ)るのは危険(きけん)だ。

It is dangerous to walk around outside alone late at night.

親友(しんゆう)と夜更(よふ)けまで七(なな)時間(じかん)にわたって語(かた)り合(あ)っていました。

I was talking with my best friend until the late hours of the night for seven hours.

夜更(よふ)けまで遊(あそ)び歩(ある)いていたのなら不審(ふしん)者(しゃ)に絡(から)まれるのも当然(とうぜん)だ。

If you were wandering around playing until the late hours of the night, it's only natural that you'd get involved with suspicious people.