Yacht

Yacht \yot\ , noun;
1. A vessel used for private cruising, racing, or other noncommercial purposes
verb;
1. To sail, voyage, or race in a yacht

This word dates to the 1550's from yeaghe ("a light, fast-sailing ship"), which is probably derived from Norwegian yaght.  Yaght is from Middle Late German jacht, which is a shortened form of jachtschip (literally "ship for chasing," actually meant "fast pirate ship"). The jacht in jachtschip means "chase" and comes from Old High German jagon, from Proto-Germanic *jagojanan.