Proto-IE: *kust- (-th-)
Meaning: bladder, inner part of kidney, gut
Old Indian: koṣṭha- m., n. `any one of the viscera of the body (partic. stomach, abdomen); store-room', kúṣṭha- m. `cavity of the loin (?)', kúṣṭhikā f. `contents of the entrails'
Other Iranian: NPers kušt `Weichen'
Old Greek: kǘsti-s, -eōs/-i(d)os f. `Blase, Harnblase, Schlauch, Säckchen'; kǘstiŋk-s (Hp. ap. Gal.) `id.'; kǘstho-s m. `weibliche Scham'
Latin: cunnus, -ī m. `der weibliche Geschlechtsteil'
Celtic: Cymr cwthr `After, Mastdarm'
Russ. meaning: внутренняя емкость тела
References: WP II 546 f
