彼は必ず成功するよ。

彼は必ず成功するよ。

He will succeed without fail.

彼(かれ)は必(かなら)ず成功(せいこう)するよ。

Kare wa kanarazu seikōsuru yo.

彼 (かれ)

he; him; his; boyfriend

は (は)

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

必ず (かならず)

always; without exception; necessarily; certainly; without fail; positively; invariably

成功 (せいこう)

success; hit

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ヒツ、かなら.ず

Meanings: invariably, certain, inevitable

Readings: セイ、ジョウ、な.る、な.す、 -な.す

Meanings: turn into, become, get, grow, elapse, reach

Readings: コウ、ク、いさお

Meanings: achievement, merits, success, honor, credit