合 Home·Characters·合 Character · Actions 合 あう au to join, fit Composition 123456 口mouth Origin A lid fits onto an opening (口): what matches and comes together. In the thoughts 合うauto suit Proverbs carrying this character 147 馬が合う Getting along like rider and horse. Related characters 乗to ride, mount交to cross, exchange仕to serve付to hand over, attach会meeting, gathering住to dwell佐to assist作to make修to cultivate, mend倒to fall, topple