πορνεύω (porneuō)

The verb porneuō describes the act of engaging in unlawful sexual intercourse, often translated as "committing sexual immorality" or "fornication." In the New Testament, it carries a specific weight beyond general sin, pointing to illicit sexual behavior that violates God’s design for human relationships. The Apostle Paul uses this term when urging believers to flee from such practices, emphasizing the need for bodily purity (1 Corinthians 6:18).

While its primary meaning is physical, the word also functions metaphorically in Scripture to describe spiritual unfaithfulness. This usage mirrors the Old Testament prophets, who likened idolatry to prostitution because it involves turning away from God to pursue other gods. In Revelation, John applies this imagery to churches that compromise with pagan culture, describing their participation in idolatrous feasts as porneuō (Revelation 2:14, 20; 17:2). This dual usage highlights how the text views spiritual loyalty through the lens of relational fidelity.

The root noun from which this verb derives refers to a prostitute or harlot, grounding the action in a concrete social reality. Translators must carefully choose English equivalents that capture both the physical and spiritual dimensions without losing the severity of the original term. The consistent thread across these contexts is the idea of giving oneself over to something outside of covenant faithfulness.