expression, godan verb (-u)
play a part in; be partly responsible for
Used when someone or something contributes to a larger effort or outcome, often in a supporting or partial role. Common in formal or business contexts.
彼はプロジェクトの成功に一端を担った。
He played a part in the project's success.
この技術が医療の発展の一端を担っている。
This technology is partly responsible for the advancement of medicine.