'Powerful' in the Bible

The voice of Jehovah is powerful; The voice of Jehovah is full of majesty.

After this I saw in the night-visions, and, behold, a fourth beast, terrible and powerful, and strong exceedingly; and it had great iron teeth; it devoured and brake in pieces, and stamped the residue with its feet: and it was diverse from all the beasts that were before it; and it had ten horns.

seeing that ye seek a proof of Christ that speaketh in me; who to you-ward is not weak, but is powerful in you: