相あい役やく

noun

colleague; fellow worker

Refers to someone who shares the same role or duty, especially in a workplace or official setting. Somewhat formal and less common than 同僚 in everyday speech.

• 彼かれは私わたしの相あい役やくとして、同おなじプロジェクトを担たん当とうしている。

  He is my colleague and is in charge of the same project.