The verb ἱερουργέω means to perform priestly service or minister in a sacred, cultic manner. It combines ἱερός (sacred) with ἔργον (work), denoting sacred service or ritual ministry. Romans 15:16 uses it metaphorically: Paul describes his apostolic work as "ministering the gospel of God" in priestly fashion, so that the offering of the Gentiles might be acceptable. The verb elevates evangelism to cultic language—Paul serves as a priest whose sacrifice is the converted Gentiles. Classical sources use it for performing sacred rites or offering sacrifices. Translations render it "ministering as priest" or "serving as sacrificateur," preserving the priestly imagery.