偶然

In a sentence

• 公園で偶然友人に会いました。

  I met a friend at the park by coincidence.

  In this sentence, “偶然” refers to an unplanned or unexpected occurrence of meeting someone.

• 偶然そのイベントの詳細を知りました。

  I learned the details of the event by chance.

  “偶然” is used here to describe an incidental acquisition of knowledge or information.

• 偶然にも、私たちが同じ電車に乗っていました。

  Coincidentally, we were on the same train.

  Here, “偶然にも” emphasizes the surprising or noteworthy aspect of the coincidence.