Waterman

Part of speech: noun (n.)

1. A man who plies for hire on rivers, lakes, or canals, or in harbors, in distinction from a seaman who is engaged on the high seas; a man who manages fresh-water craft; a boatman; a ferryman.

2. An attendant on cab stands, etc., who supplies water to the horses. [Eng.] Dickens.

3. A water demon. Tylor.