V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry कार्ष्ण
कार्ष्णkārṣṇaa.(-ष्णी f.) [कृष्ण-अण्]
(-ष्णीFeminine) कृष्ण-अण्
Belonging to Kṛiṣṇa or Viṣṇu; कार्ष्णेन पत्रिणा शत्रुः स भिन्नहृदयः पतन् R.15.24.