彼が戻るまで待とう。

彼が戻るまで待とう。

Let's wait till he comes back.

彼(かれ)が戻(もど)るまで待(ま)とう。

Kare ga modoru made matou.

彼 (かれ)

he; him; his; boyfriend

が (が)

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

戻る (もどる)

to turn back (e.g. half-way); to return; to go back; to recover (e.g. something lost); to be returned; to rebound; to spring back

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

待つ (まつ)

to wait; to await; to look forward to; to anticipate; to depend on; to need

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: レイ、もど.す、もど.る

Meanings: re-, return, revert, resume, restore, go backwards

Readings: タイ、ま.つ、 -ま.ち

Meanings: wait, depend on