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.
निहत्य धार्तराष्ट्रान्नः का प्रीतिः स्याज्जनार्दन ॥
nihatya dhārtarāṣṭrānnaḥ kā prītiḥ syājjanārdana. — O Janardana, I would not consent to slay even for the kingdom of the three worlds; how then for earth? What pleasures can be ours after killing the… 1·35
काkānominative singular of the feminine form of the pronoun kim (what, which, who).