What does ἐθελοθρησκεία (ethelothrēskeía) mean in the Bible?
ἐθελοθρησκεία is a rare and pointed word, used in Colossians 2:23 for a self-made or self-imposed religion that appears wise but lacks power against fleshly indulgence. The word combines the idea of willing or self-chosen practice with religious devotion.