mediate ((between));act as 「(an) intermediary [(a) mediator] ((for))
- 彼の仲立ちで商談が成立した
- A deal was concluded through his intermediation.
- 伯父の仲立ちで会社に就職した
- He obtained a position in a firm 「with the help [through the influence/《文》 through the good offices] of his uncle.