ἄκαρπος

For if I pray in a tongue, my spirit prays, but my mind is unfruitful.

For if you possess these qualities and continue to grow in them, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ.

Have no fellowship with the fruitless deeds of darkness, but rather expose them.

These men are hidden reefs in your love feasts, shamelessly feasting with you but shepherding only themselves. They are clouds without water, carried along by the wind; fruitless trees in autumn, twice dead after being uprooted.

The seed sown among the thorns is the one who hears the word, but the worries of this life and the deceitfulness of wealth choke the word, and it becomes unfruitful.