Luff

Definition:

(n.) The side of a ship toward the wind.
(n.) The act of sailing a ship close to the wind.
(n.) The roundest part of a ship's bow.
(n.) The forward or weather leech of a sail, especially of the jib, spanker, and other fore-and-aft sails.
(v. i.) To turn the head of a vessel toward the wind; to sail nearer the wind; to turn the tiller so as to make the vessel sail nearer the wind.

Compare luff with other words:

luff vs. staysail

course vs. luff

luff vs. windward

leeward vs. luff

luff vs. vertical