Good will, kindness, eager devotion, enthusiastic loyalty. The noun form of eunoeo, expressing not just the absence of hostility but active, positive regard. Used for the attitude servants should have toward masters and spouses toward each other — wholehearted, willing devotion rather than grudging compliance.
Eunoia transforms duty into delight. In Ephesians 6:7, slaves are told to serve with eunoia — good will, as if serving the Lord, not people. This radically reframes all human relationships. When our service is rendered with eunoia toward Christ, even the most menial task becomes worship. The word also appears in marriage contexts, reminding spouses that love is not obligation but eager devotion.