彼と知り合いになった

became acquainted with him

→ 彼
phrase Rare #32,307
became acquainted with him A neutral way to say that you met someone and became acquainted with him. 知り合いになった literally means “became acquainted,” and 彼と means “with him.”
JA: 私は去年彼と知り合いになった。
EN: I became acquainted with him last year.

私はリーさんを通して彼と知り合いになった

I got to know him through Mr. Lee.

そのとき以来彼と知り合いになった

I have known him since then.

私は去年彼と知り合いになった

I got to know him last year.

私は昨夜彼と知り合いになった

I met him for the first time last night.

彼と知り合いになった

I got to know him.