Verb Stem + 合う

A verb stem + 合う forms a compound verb with the added meaning of "to each other." The exact translation will depend on the original verb used, like 話し合う as "to talk to each other" or "to discuss." Sentences with this type of verb often also use お互いに which also means "each other" or "one another."

この問題について、グループで話し合って下さい。
Discuss this problem in groups, please.

毎日学校で、リーさんとアリスお互いにほめ合うんだなぁ。
Every day at school, Lee-san and Alice compliment each other.

大きな災害の時は、みんなで助け合うことが大切だ。
When there's a major disaster, it's important for everyone to help one another.

アヤトとライトはずっと見詰め合ってるんだね。
Ayato and Laito have been staring at each other for a long time.