"Coach"

"The word "coach" comes from the word stagecoach, which was the major mode of transportation used by people before the automobile. Whether it was drawn by a horse of steam engine, the stagecoach took people from one place to another. The coach in athletics does the same thing - he or she is able to take people from where they are to where they want to be. This is the essence of what a coach truly is."
http://www.coachhoover.blogspot.com/