Possibly a reduplicated form of Proto-Indo-European *gʷerh₃- (“to devour”) (whence also vorō), though the exact morphology is unclear. Compare Sanskrit गर्गर (gargara, “whirlpool, eddy; water-jar; subterranean drain”), Ancient Greek γόργυρα (górgura, “underground drain; water-pot; trough”), Proto-Celtic *brāgants (“neck; throat”) and English craw.