彼は夜遅くまで寝ないで勉強する。

彼は夜遅くまで寝ないで勉強する。

He sits up studying till late at night.

彼(かれ)は夜(よる)遅(おそ)くまで寝(ね)ないで勉強(べんきょう)する。

Kare wa yoru osoku made nenaide benkyōsuru.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

夜 (よる、よ)

evening; night

遅い (おそい)

slow; late (e.g. "late at night"); too late; dull; stupid

迄 (まで)

until (a time); till; to; up to; to (a place); as far as; to (an extent); up to; so far as; even; only; merely

寝る (ねる)

to lie down; to go to bed; to lie in bed; to sleep (lying down); to sleep (with someone, i.e. have intercourse); to lie idle

勉強 (べんきょう)

study; diligence; discount; reduction

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ヤ、よ、よる

Meanings: night, evening

Readings: チ、おく.れる、おく.らす、おそ.い

Meanings: slow, late, back, later

Readings: シン、ね.る、ね.かす、い.ぬ、みたまや、や.める

Meanings: lie down, sleep, rest, bed, remain unsold

Readings: ベン、つと.める

Meanings: exertion, endeavour, encourage, strive, make effort, diligent

Readings: キョウ、ゴウ、つよ.い、つよ.まる、つよ.める、し.いる、こわ.い

Meaning: strong