Euhydration - Normal daily body water content
Hypohydration - Decrease in body water content
Dehydration - The process of losing water from a state of euhydration towards hypohydration.
Hyperhydration - Increase in body water content
Rehydration - The process of adding water from a state of hypohydration towards euhydration.
Overhydration - The process of adding water from a state of euhydration towards hyperhydration.