Varuṇa’s name is from the verbal root vṛ, ‘to cover, to encompass’; for he encompasses the universe, and his attribute is sovereignty.
Campbell derives Vara/Varuṇa from the root vṛ (‘to cover, to encompass’), identifying cosmic sovereignty and the regulation of ṛta as the deity’s defining attributes.
, Oriental Mythology: The Masks of God, Volume II, 1962thesis