The Greek ektos means "outside" or "except" — used as both a preposition and adverb to indicate exclusion or exception. It appears in 1 Corinthians 6:18 ("flee sexual immorality — every other sin a person commits is outside the body"), in 1 Corinthians 15:27 ("except God himself"), and in 2 Corinthians 12:2 ("whether in the body or apart from the body").
Ektos (outside/except) marks the boundaries of Paul's theological arguments. In 1 Corinthians 6:18, Paul argues that sexual sin has a unique relation to the body ("outside the body") compared to other sins — the body itself is the instrument and victim of sexual immorality, making sexual purity a distinctly embodied spiritual concern. In 1 Corinthians 15:27, ektos preserves the monarchy of God — "everything is subjected to Christ, except for the one who subjected it all." God remains sovereign over all sovereignty.