The Greek ekporneuo means to indulge in sexual immorality intensely or thoroughly β the ek prefix suggesting excess and completion. It appears only once in the NT, in Jude 7, describing Sodom and Gomorrah's sin: 'They gave themselves up to sexual immorality and pursued unnatural desire.' The word captures not just the act but the total surrender to sexual sin.
Jude's use of ekporneuo for Sodom's sin specifies the nature of the judgment: they pursued sexual immorality to the extreme, surrendering themselves completely. The result was that they 'serve as an example of those who suffer the punishment of eternal fire' (Jude 7). Jude is warning the church against those who 'pervert the grace of God into a license for immorality' (v.4). Sexual sin is never a private matter in Scripture β it is covenant-breaking, dishonoring the image of God, and has eternal consequences. The ekporneuo of Sodom is a perpetual warning.