The Greek delos means clear, evident, plain, or obvious — something that is openly manifest and requires no special insight to perceive. It is related to the verb deloo (to reveal, show clearly).
Delos is the word of unmistakable clarity — what is placed in plain sight, requiring no special interpretation. It appears in 1 Corinthians 15:27 where Paul states it is 'delos' (obvious) that God is not subject to the Son's future reign. In Galatians 3:11, the justification by faith principle is 'delos' from Habakkuk 2:4. And in 1 Timothy 6:7, it is 'delos' (evident/obvious) that we bring nothing into this world and can take nothing out. The use of delos in theological argument is striking — Paul treats certain gospel truths as self-evident once the relevant Scripture is cited. This confidence in the clarity of God's word is itself a theological stance: Scripture does not obscure the gospel but declares it plainly to those with eyes to see.