彼は遅かれ早かれ

he will sooner or later

→ 彼
phrase Rare #25,389
he will sooner or later 彼は means “he,” while 遅かれ早かれ is a set phrase meaning “sooner or later.” It is often followed by a prediction or future event.
JA: 彼は遅かれ早かれ真実を知ることになる。
EN: He will sooner or later learn the truth.

彼は遅かれ早かれよい弁護士になるでしょう

Sooner or later, he will become a good lawyer.

彼は遅かれ早かれやってくるだろう

He'll come sooner or later.

彼は遅かれ早かれ私にすべてを語ってくれるだろう

Sooner or later, he’ll tell me everything.

彼は遅かれ早かれ病気になるであろう

He will get sick sooner or later.

彼は遅かれ早かれその秘密を知るでしょう

He will find out the secret sooner or later.

彼は遅かれ早かれ必ず大統領になる男だ

He is a man who is bound to become president sooner or later.

彼は遅かれ早かれ戻ってくるよ

He'll be back sooner or later.