The Avestan word māh-
Word māh-
Meaning moon
See also Proto-Indo-European: *méh₁-nōt ‘moon, month’
Sanskrit: mā́sa ‘moon’

Other words that might be of interest
hvarə ‘sun’, huuar- ‘sun’, asman- ‘stone, sky’, snaēžā ‘snow’, star- ‘star’