रात्री

Etymology
From. Cognate with 🇨🇬, 🇨🇬, whence 🇨🇬. The Rigveda exclusively uses and the term gradually started falling out of use and started being replaced by the variant  from the Middle Vedic period onwards. While post-Rigveda Vedic texts use both the variants, Classical Sanskrit only attests.

Noun

 * 1)  night