Etymology of the English word phreatic
the English word phreatic
derived from the Greek word phrear, φρέαρ (a hole in the ground (dug for obtaining or holding water or other purposes); a cistern or well; figuratively, an abyss (as a prison))
derived from the French word phréatique
derived from the Greek word phreas
derived from the Proto-Indo-European root *bhreu-