पूर्णमास्

From Proto-Indo-Iranian *pr̥Hná-mā́Has ~ *pr̥Hná-mā́Hasas (“full moon”). Compare Avestan 𐬞𐬆𐬭𐬆𐬥𐬋-𐬨𐬂𐬢𐬵𐬀 (pər^ənō-måŋha, “full moon”), Middle Persian pwrm՚ẖ (purrmāh, “full moon”). See also पूर्णमास (pūrṇamāsa), attested in the Yajurveda. Equivalent to पूर्ण (pūrṇa, “full”) +‎ मास् (mās, “moon”).

• (Vedic) IPA^(key): /puːɾ.ɳɐ́.mɑːs/
• (Classical Sanskrit) IPA^(key): /puːɾ.ɳɐ.mɑːs̪/

पूर्णमास् • (pūrṇámās) stem, m

1. full moon; the day or night of the full moon
   • c. 700 BCE, Śatapatha Brāhmaṇa 11.2.4.7:

     मन एव पूर्णमाः। पूर्णमिव हीदं मनो...

     mana eva pūrṇamāḥ. pūrṇamiva hīdaṃ mano...

     The full moon [represents] the mind, for full, as it were, is this mind...

• पूर्णिमा (pūrṇimā)

• Turner, Ralph Lilley (1969–1985) “pūrṇámās”, in A Comparative Dictionary of the Indo-Aryan Languages, London: Oxford University Press, page 472