우연이

In a sentence

• 우리의 만남은 정말로 우연이었어요.

  Our meeting was truly coincidental.

  Here, '우연이' is a noun meaning coincidence, used to describe the nature of the meeting.

• 어제 길에서 옛 친구를 만난 것은 우연이에요.

  Meeting an old friend on the street yesterday was a coincidence.

  In this sentence, '우연이' signifies an incidental occurrence, explaining the unexpected encounter.

• 이런 일이 우연이 아니라는 것을 믿어요.

  I believe that such events are not coincidences.

  This usage negates the term '우연이,' expressing the belief that the events have significant rather than accidental meaning.