join together, meet', examples being 合同 (combined/united), 合成 (composition), 結合 (unite/combine/join together), 連合 (union/alliance/association), 統合 (combine/unify), and 合意 (mutual agreement). There is an idea of reciprocity , 知り合う (to get to know one another), 話し合い (talk/discussion/negotiation), and 待ち合わせる (meet by appointment).   気 is often used to express a feeling, as