Godan verb with 'u' ending, Intransitive verb
to be understood by each other (of thoughts, feelings, etc.); to be comprehended
彼らは素敵なカップルである。いつもお互いに気持ちが通じあっている。They are a nice couple; they are always in sympathy with each other. Godan verb with 'u' ending, Transitive verb
to exchange with each other (thoughts, feelings, etc.); to express to each other (e.g. intentions); to communicate with each other
Also written 通じあう【つうじあう】