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Clew ::
Clew (n.) To move of draw (a sail or yard) by means of the clew garnets, clew lines, etc.; esp. to draw up the clews of a square sail to the yard..
Reef ::
Reef (v. t.) That part of a sail which is taken in or let out by means of the reef points, in order to adapt the size of the sail to the force of the wind..