'Bellow' in the Bible

Does [the] wild ass bray over grass, or [the] ox bellow over its fodder?

Because ye were glad, because ye rejoiced, O ye destroyers of mine heritage, because ye are grown fat as the heifer at grass, and bellow as bulls;

Does a lion roar in the woods if he has not cornered his prey? Does a young lion bellow from his den if he has not caught something?