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agua
The water
Agua is water. El agua is "the water" or just water. It is not a water hole. A water hole is abrevadero, aguada, or bebedero
In Spanish, commands exist in multiple forms depending on formality and number.
Singular/Informal: No te mojes!
Singular/Formal: No se moje!
Plural/Informal: No os mojéis!
Plural/Formal: No se mojen!
You could say "Agua sin tratamiento" or "agua no potable".
Gus Menos was born in 1920.