One of the mysteries of the English language finally explained.
1Water coloured green by algae or other organic matter.
2Environmental Science. In water resource management: water that is directly derived from rainfall and used by plants or stored in the soil.
Early 17th century (in an earlier sense). From green + water.
green water/ˌɡriːn ˈwɔːtə/
In this article we explore how to impress employers with a spot-on CV.