This adjective describes someone practicing the same trade or craft, a fellow artisan. In Acts 18:3, it explains why Paul stayed with Aquila and Priscilla in Corinth: 'because he was of the same trade, he stayed with them and worked, for they were tentmakers by trade.' Shared occupation created natural partnership—economic collaboration and likely mutual support in a new city. The term emphasizes professional commonality that facilitated both practical cooperation and ministry partnership.