Harā Bərəzaitī, literally meaning "High Watchpost", is the name given in the Avestan language

Avestan language

Avestan is an East Iranian language known only from its use as the language of Zoroastrian scripture, i.e. the Avesta, from which it derives its name...

 to a legendary mountain around which the stars and planets revolve.
Harā Bərəzaitī reflects Proto-Iranian *Harā Bṛzatī. Harā may be interpreted as "watch" or "guard", from an Indo-European

Proto-Indo-European language

The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

 root *ser- "protect". *Bṛzatī is the feminine form of the adjective *bṛzant- "high". Hence 'Harā Bərəzaitī' "High Watchpost."

The mountain has several secondary appellations, including Haraitī "the guarding one" (feminine), Taēra "peak" (Middle Persian Tērag) and Hukairya "of good deeds" (Middle Persian Hukar).

*Bṛzant- "high", is the ancestor of modern Persian boland (بلند).