in Greek mythology, the daughter of Zeus and Demeter, also called Persephone in her aspect as Hades's wife, from Greek korē "maiden," from PIE *korwo- "growing" (hence "adolescent"), from suffixed form of root *ker- (2) "to grow."
wife of Hades, queen of the netherworld, identified with Kore, daughter of Zeus and Demeter, from Greek Persephone. De Vaan writes that "The name was always considered obscure" until a thorough investigation published in 2006 reported that the original form was persophatta, "as found in eight attestations, seven of which are on 5th c. BC Attic vases (by seven different painters)." He analyzes it as *perso-, cognate with Sanskrit parsa- "sheaf of corn," + a second element from the PIE root *gwhen- "to hit, strike" (see bane) thus "a female thresher of corn."
It is the hypothetical source of/evidence for its existence is provided by: Greek kouros "boy," korē "girl;" Latin crescere "come forth, spring up, grow, thrive, swell," Ceres, goddess of agriculture, creare "to bring forth, create, produce;" Armenian serem "bring forth," serim "be born."