Genesis 7:20 Meaning

18And the waters prevailed, and were increased greatly upon the earth; and the ark went upon the face of the waters.

19And the waters prevailed exceedingly upon the earth; and all the high hills, that were under the whole heaven, were covered.

20Fifteen cubits upward did the waters prevail; and the mountains were covered.

21And all flesh died that moved upon the earth, both of fowl, and of cattle, and of beast, and of every creeping thing that creepeth upon the earth, and every man:

22All in whose nostrils was the breath of life, of all that was in the dry land, died.