'Exert' in the Bible

If an iron axhead is blunt and a workman does not sharpen its edge, he must exert a great deal of effort; so wisdom has the advantage of giving success.

All of you, gather together and listen! Who among them announced these things? The Lord's ally will carry out his desire against Babylon; he will exert his power against the Babylonians.

"Exert every effort to enter through the narrow door, because many, I tell you, will try to enter and will not be able to.