expression, godan verb (-ru)
act as an intermediary; step in; intervene
Used when a person inserts themselves between two parties to mediate, interrupt, or help. Can be physical or figurative.
彼が二人の喧嘩の間に入って仲裁した。
He stepped in between the two fighting and mediated.
交渉が難航したので、弁護士が間に入った。
The negotiations were difficult, so a lawyer acted as an intermediary.