中ちゅう水すい道どうMeaningsNoun1. gray-water system; grey-water system; recycled waste-waterKanji used中in水water道roadwayPitch accentちゅうすいどうComposed of中ちゅうmedium (size); average (grade, level, etc.); middle; in; within; out of (e.g. ten people); among; during; while; in (the course of); …Noun水すい道どうwater supply; water service; waterworks; tap water; channel; strait; water course; waterwayNoun