The Title Krishna originates from your Sanskrit word Kṛṣṇa, and that is primarily an adjective which means “black”, “darkish” or “dark blue”. The waning moon is termed Krishna Paksha from the Vedic custom, concerning the adjective this means “darkening”. Soon after Krishna killed the arista (bull) demon, The nice sage https://www.youtube.com/shorts/lMzgQ7m0MTE