godan verb (-u)
carry on work; perform duties; conduct business
Formal or literary verb meaning to diligently carry out one's work, duties, or business. Often implies sustained effort and responsibility.
彼は長年、会社の業務を勤め行なってきた。
He has carried on the company's business for many years.
日々の務め
It is important to diligently perform one's daily duties.