dropsy (n.)

"morbid accumulation of watery liquid in a part of the body," late 13c., a shortening of Middle English ydropsy, idropsie, from Old French idropsie and directly from Latin hydropsis, from Greek hydrops (genitive hydropos) "dropsy," from hydor "water" (from suffixed form of PIE root *wed- (1) "water; wet").