The Avestan word xvafəna-
Word xvafəna-
Meaning sleep
See also Homeric Greek: ὕπνος ‘sleep, slumber’
Early Proto-Albanian: *supnā ‘sleep’
Proto-Indo-European: *swópnos ‘sleep, dream’
Proto-Celtic: *suφno ‘sleep’
Sanskrit: svápna ‘sleep, dream’

Other words that might be of interest
zānu- ‘jaw’, 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’, pad- ‘foot’