トムは早朝出発するつもりだったが、寝過ごした。

とむは早朝出発するつもりだったが、寝過ごした。

Tom expected to leave early in the morning, but he overslept.

トムは早朝(そうちょう)出発(しゅっぱつ)するつもりだったが、寝過(ねす)ごした。

Tomu wa sōchō shuppatsusuru tsumori datta ga, nesugoshita.

富む (とむ)

to be rich; to become rich; to be abundant (with); to abound (with); to be rich (in)

は (は)

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

早朝 (そうちょう)

early morning

出発 (しゅっぱつ)

departure

積もり (つもり)

intention; plan; conviction; belief

だ (だ)

be; is; indicates past or completed action; indicates light imperative

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

寝過ごす (ねすごす)

to oversleep

Readings: ソウ、サッ、はや.い、はや、はや-、はや.まる、はや.める、さ-

Meanings: early, fast

Readings: チョウ、あさ

Meanings: morning, dynasty, regime, epoch, period, (North) Korea

Readings: シュツ、スイ、で.る、 -で、だ.す、 -だ.す、い.でる、い.だす

Meanings: exit, leave, go out, come out, put out, protrude

Readings: ハツ、ホツ、た.つ、あば.く、おこ.る、つか.わす、はな.つ

Meanings: departure, discharge, publish, emit, start from, disclose, counter for gunshots

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: カ、す.ぎる、 -す.ぎる、 -す.ぎ、す.ごす、あやま.つ、あやま.ち、よ.ぎる

Meanings: overdo, exceed, go beyond, error