expression, godan verb (-u)
play a part; take a share; shoulder a portion of responsibility
Used when someone contributes to a larger effort or shares a burden, often in formal or organizational contexts. The phrase literally means 'to carry one wing'.
彼はプロジェクトの成功に一翼を担った。
He played a part in the success of the project.
地域社会の発展
It is our mission to take a share in the development of the local community.