'Unfruitful' in the Bible

He also that received seed among the thorns is he that heareth the word; and the care of this world, and the deceitfulness of riches, choke the word, and he becometh unfruitful.

And the cares of this world, and the deceitfulness of riches, and the lusts of other things entering in, choke the word, and it becometh unfruitful.

For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.

And have no fellowship with the unfruitful works of darkness, but rather reprove them.

And let ours also learn to maintain good works for necessary uses, that they be not unfruitful.

For if these things be in you, and abound, they make you that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ.