Dirghatamas

In Vedic materials Dirghatamas appears as an Angirasa rishi whose hymns are preserved in the Rigveda (RV I.140–164). Later narrative treatments (e.g., a Mahābhārata episode summarized in modern sources) cast his birth as resulting from an episode involving Brhaspati and record a curse said to have produced his blindness; that epic account is the source of the etymological explanation of his name as 'one for whom darkness is constant.' He is also situated mytho-historically as purohita to King Bharata and as participant in episodes (including niyoga at King Bali's request) that link him etiologically to the foundations of certain territorial names.

The Vedic hymns themselves do not give a detailed physical portrait; later epic and brāhmaṇa narratives report that he was blind, an attribute invoked by the Mahābhārata tradition to explain his name (Dīrghatamas, 'one for whom darkness is constant'). No consistent descriptions of height, dress, or other bodily features are provided in the cited sources.

Dirghatamas' primary capacities in the sources are literary and sacerdotal: composition and transmission of Rigvedic hymns (RV I.140–164) that treat Agni, the sun, sacrifice, Vac/the Word, and speculative metaphysical themes (notably passages in RV 1.164). He is represented as a purohita (chief priest) to King Bharata in brāhmaṇa literature and as a seer whose utterances function as authoritative sacred revelation within Vedic ritual and doctrinal contexts. Narrative episodes attribute to him roles in niyoga (ritual fathering) and in genealogical/etiological traditions connecting rishi lineages to later clans and territories.