Sentence:  The key to a good <WSD>gybe</WSD> is to bring the spinnaker round to the old weather side before you begin, and then to steer to keep some wind in the kite. 
Meaning of the word marked with <WSD> tags:  A manoeuvre in which the stern of a sailing vessel crosses the wind, typically resulting in the forceful and sudden sweep of the boom from one side of the vessel to the other.