運営[unei] management
運営者[uneisha] manager
営み[itonami] work
営む[itonamu] to carry on (e.g. in ceremony)
営業[eigyou] business

営業マン[eigyouman] salesman
営業時間[eigyoujikan] business hours
営業収支[eigyoushuushi] operating balance
営業中[eigyouchuu] open (e.g. store)
営業畑[eigyoubatake] sales field

孜孜[shishi] assiduously
孜孜として[shishitoshite] assiduously

孜孜営営[shishieiei] assiduously