合う, あう, おう
Conjugated: 合わなかった
Godan verb, Intransitive
1. to come together, to merge, to unite, to meet
2. to fit, to match, to suit, to agree with, to be correct
3. to be profitable, to be equitable
Auxiliary verb, after the -masu stem of a verb
4. to do ... to each other, to do ... together
2人の女性はお互い微笑みあった。