私はよく徹夜する。

私はよく徹夜する。

I often stay up all night.

私(わたし)はよく徹夜(てつや)する。

Watashi wa yoku tetsuyasuru.

私 (わたし、わたくし)

I; me; private affairs; personal matter; secrecy; selfishness

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

良く (よく)

nicely; properly; well; skillfully; skilfully; frequently; often

徹夜 (てつや)

all night; all-night vigil; sleepless night

Readings: シ、わたくし、わたし

Meanings: private, I, me

Reading: テツ

Meanings: penetrate, clear, pierce, strike home, sit up (all night)

Readings: ヤ、よ、よる

Meanings: night, evening