Proto-IE: *(a)wenǝst-
Meaning: bladder, rectum, rennet bag
Old Indian: vastí- m.f. `bladder; lower belly, abdomen'; vaniṣṭhu- m. `a part of the entrails of an animal offered in sacrifice - either the rectum or a partic. part of intestines near the omentum'
Old Greek: [ǟ́]nüstro-n n. 'fourth stomach of ruminating animals' (Arist.+) (written énüstron in LXX)
Latin: vēnsīca (vēsīca) f. `die Blase; Harnblase'
Russ. meaning: мочевой пузырь, прямая кишка, сычуг
References: WP I 190 f