the.com/dehydration
Your body filing a water shortage complaint you ignored three glasses ago.
means A harmful loss of body fluids where you lose more water than you take in, throwing off normal function.
from From Greek hydor, water, with de- meaning removal — literally the undoing of water, coined in the 1800s as chemistry learned to drive moisture out of anything.
Thirst lagYou're already dehydrated when thirst arrives.
Brain shrinkMild dehydration measurably reduces concentration and mood.
Hidden waterAbout 60 percent of your body is fluid.