The Avestan word drvaēna-
Word drvaēna-
Meaning wooden
See also Homeric Greek: δρῦς ‘tree’
Linear B: do-we-jo ‘wooden’
Proto-Indo-European: *der-, drew- ‘tree, wood’
Early Proto-Albanian: *druwa ‘tree, wood’
Old Norse: tré ‘tree’
Hittite: ta-a-ru ‘wood, tree’

Other words that might be of interest
gairi- ‘mountain’, būmi- ‘earth’, asman- ‘stone, sky’, zam- ‘earth, ground’, razura- ‘forest, grove’