The Greek word αιθήρ
Word αιθήρ
aj tʰ ɛː. r
IPA ajtʰɛː.r
Meaning air, upper layer of the atmosphere, sky, ether
See also Proto-Indo-European: *h₂eidh- ‘kindle, ignite’
Ancient Macedonian: ἀδῆ ‘heaven, sky’

Other words that might be of interest
νίφα ‘snow’