'Strong' in the Bible

and I saw a strong messenger crying with a great voice, 'Who is worthy to open the scroll and to loose the seals of it?'

And I saw another strong messenger coming down out of the heaven, arrayed with a cloud, and a rainbow upon the head, and his face as the sun, and his feet as pillars of fire,

because of this, in one day, shall come her plagues, death, and sorrow, and famine; and in fire she shall be utterly burned, because strong is the Lord God who is judging her;

from afar having stood because of the fear of her torment, saying, Woe, woe, the great city! Babylon, the strong city! because in one hour did come thy judgment.

And one strong messenger did take up a stone as a great millstone, and did cast it to the sea, saying, 'Thus with violence shall Babylon be cast, the great city, and may not be found any more at all;

that ye may eat flesh of kings, and flesh of chiefs of thousands, and flesh of strong men, and flesh of horses, and of those sitting on them, and the flesh of all -- freemen and servants -- both small and great.'