What is from a lower to a higher place on, upon, or along; at a higher situation upon; at the top of. In going up a hill, the knees will be most weary; in going down, the thihgs. Bacon called?

up — From a lower to a higher place on, upon, or along; at a higher situation upon; at the top of. In going up a hill, the knees will be most weary; in going down, the thihgs. Bacon. (Webster's 1913.)