This is the 4298th most frequent Japanese word.
再会
"再会" means "reunion" or "meeting again."
Here, '再会' refers specifically to the act of meeting again after an extended time.
再会するのは何年ぶりだろう。
How many years has it been since we last met?
In this sentence, '再会' describes the chance occurrence of meeting someone again.
昔の友達と偶然再会しました。
I unexpectedly reunited with an old friend.
This use of '再会' expresses anticipation for a planned meeting or gathering after separation.