Having absorbed or been supplied with water; maintaining adequate fluid levels in body tissues.
From Greek hydor meaning 'water' plus the suffix -ate (to cause to become). The term originated in chemistry to describe compounds containing water molecules, then extended to biology and medicine.
The human body's need to stay hydrated reflects our evolutionary origins from aquatic environments - we're essentially walking water balloons that need constant replenishment. The word connects us to the Greek understanding that water is fundamental to all life.
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