Mitra

From Sanskrit मित्र (mitrá); see there for further etymology.

Compare Avestan-derived Mithra (Iranian), and Latin-derived Mithras (Roman).

Mitra

1. A divinity of Indic culture, hypostasis of friendship and one-half of the dvandva (compound divinity) Varuna-Mitra.
   • 1989, Elizabeth-Chalier Visuvalingam, "Bhairava's Royal Brahmanicide," Criminal Gods and Demon Devotees, p. 200.

     [In post-Vedic India], Vedic Mitra practically disappears and Varuna is relegated to a subsidiary position

2. (uncommon) A deity invoked in the Hurrian Mitanni of ca. 1400 BC.
   • 1963, Jørgen Læssøe, People of Ancient Assyria: Their Inscriptions and Correspondence, Routledge, p. 86.

     when about 1350 B.C. a treaty was concluded between the king of Mittanni [...] and the Hittite ruler [...], the former calls upon the gods Mitra, Indra, Varuna, and the Nâsatya as guarantors of his sworn obligations.

3. (rare) Misspelling of Iranian Mithra (Miθra).
   • 1923, John Nicol Farquhar, The Religious Quest of India, OUP, p. 120.

     As the Avestan Mitra had a luminous character, so had the Vedic Mitra.

   • 2001, Manfred Clauss, The Roman Cult of Mithras: The God and His Mysteries, page 7:

     We cannot account for Roman Mithras in terms borrowed from Persian Mitra.

• amrit, matri-, timar, tirma