copartner

noun
co·​part·​ner | \ ˌkō-ˈpärt-nər How to pronounce copartner (audio) \
variants: or co-partner
plural copartners or co-partners

Definition of copartner

: a fellow partner his copartner in the business Whether you're communicating with a co-partner, client … or industry influencer, the language that you use has the power to make or break those relationships.— Serenity Gibbons

First Known Use of copartner

circa 1504, in the meaning defined above

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