同僚(どうりょう)coworker, co-worker, colleague, associate

彼(かれ)とは三(さん)年(ねん)前(まえ)まで同僚(どうりょう)でした。

He and I were colleagues until three years ago.

君(きみ)は同僚(どうりょう)と飲(の)みに行(い)ったりするの？

Do you go out for drinks with your colleagues?

今度(こんど)あまり仲良(なかよ)くない同僚(どうりょう)と一緒(いっしょ)に仕事(しごと)をしなくてはいけません。

I have to work with a colleague I don't get along with very well soon.

ほとんどの同僚(どうりょう)とは馬(うま)が合(あ)うが、なぜか彼(かれ)とだけは何(なに)も理解(りかい)し合(あ)えない。

I get along well with most of my colleagues, but for some reason, he is the only one I can't see eye to eye with.

あんなに明(あか)るくてみんなの人気(にんき)者(もの)だった同僚(どうりょう)に犯罪(はんざい)歴(れき)があるなんて嘘(うそ)に違(ちが)いない。

It must be a lie that my colleague, who was so cheerful and popular with everyone, had a criminal record.