godan verb (-u), intransitive verb
laugh together; laugh with each other
Describes two or more people laughing together, sharing a laugh, or laughing at the same thing.
友達と笑い合う時間が一番楽しい。
The time spent laughing with friends is the most fun.
二人は顔を見合わせて笑い合
The two looked at each other and laughed together.