'Powerful' in the Bible

His power will be great, but it will not be by his strength alone. He will cause terrible destruction. He will be successful in what he undertakes. He will destroy powerful people and the people of the holy ones.

Then a powerful king will arise, exercising great authority and doing as he pleases.

He will rouse his strength and enthusiasm against the king of the south with a large army. The king of the south will wage war with a large and very powerful army, but he will not be able to prevail because of the plans devised against him.