'Exerteth' in the Bible

And from the one of them come forth hath a little horn, and it exerteth itself greatly toward the south, and toward the east, and toward the beauteous land;

yea, it exerteth unto the host of the heavens, and causeth to fall to the earth of the host, and of the stars, and trampleth them down.

And unto the prince of the host it exerteth itself, and by it taken away hath been the continual sacrifice, and thrown down the base of his sanctuary.

And by his understanding he hath also caused deceit to prosper in his hand, and in his heart he exerteth himself, and by ease he destroyeth many; and against the prince of princes he standeth -- and without hand he is broken.