dag = mountain, could it be an IE word ?

hi guys, i have this data:

there is this word "dag/dagh" = mountain in turkish languages. see
Dagestan = mountain country, Nemrut Dagi in Cappadocia, and Kopet Dag
in Turkmenistan.

there was a Hittite sacred mountain Daha, where city Zippalanda was
built.



does anyone know the etymology of the word "dag" ?

pls point me to a turkish etymology dictionary at least

thx