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Adjective and noun from Middle English drye, dryge, drüȝe, from Old English drȳġe (“dry; parched, withered”), from Proto-West Germanic *drūgī, *draugī, from Proto-Germanic *drūgiz, *draugiz (“dry, hard”), from Proto-Indo-European *dʰerǵʰ- (“to strengthen; become hard”), from *dʰer- (“to hold, support”). The verb derives from Middle English drien, from Old English drȳġan (“to dry”), from Proto-West Germanic *drūgijan, from Proto-Germanic *drūgiz (“hard, desiccated, dry”), from Proto-Indo-European *dʰerǵʰ- (“strong, hard, solid”). cognates and related terms Cognate with Scots dry, drey (“dry”), North Frisian drüg, driig, Saterland Frisian druuch (“dry”), West Frisian droech (“dry”), Dutch droog (“dry”), Low German dröög (“dry”), German dröge (“dull”), Icelandic draugur (“a dry log”). Related also to German trocken (“dry”), West Frisian drege (“long-lasting”), Danish drøj (“tough”), Swedish dryg (“lasting, hard”), Icelandic drjúgur (“ample, long”), Latin firmus (“strong, firm, stable, durable”). See also drought, drain, dree.