The Avestan word zānu-
Word zānu-
Meaning jaw
See also Phrygian: ΑΖΕΝΑ ‘beard’
Greek: γένι ‘beard’
Proto-Indo-European: *ĝenu- ‘cheek, chin’
Armenian: cnawt ‘jaw’
Greek: γνάθος ‘jaw’
Hittite: za-ma-kur ‘beard’

Other words that might be of interest
čarǝman- ‘skin’, zǝrǝd- ‘heart’, sarah- ‘head’, gava ‘hand’, hizū ‘tongue’, staman ‘mouth’, bruuat̰ ‘eyebrow’, ast- ‘bone’, tanū- ‘body’, bāzu ‘arm, leg’, nāfa- ‘navel’, zānu- ‘knee’, xvafəna- ‘sleep’, pad- ‘foot’