'Mighty' in the Bible

But Moses responded to the LORD, "When Egypt hears that you've brought this people out from among them with a mighty demonstration of power,

Come now therefore, I pray thee, curse me this people; for they are too mighty for me: peradventure I shall prevail, that we may smite them, and that I may drive them out of the land: for I wot that he whom thou blessest is blessed, and he whom thou cursest is cursed.