'Lower' in the Bible

You are to make a roof, finishing the sides of the ark to within 18 inches of the roof. You are to put a door in the side of the ark. Make it with lower, middle, and upper decks.

Let the girl to whom I say, ‘Please lower your water jug so that I may drink,’ and who responds, ‘Drink, and I’ll water your camels also’—let her be the one You have appointed for Your servant Isaac. By this I will know that You have shown kindness to my master.”