निश्चयniścaya1 Ascertainment, investigation, inquiry.
स निश्चयेन योक्तव्यो योगोऽनिर्विण्णचेतसा ॥
कोशःDictionaries
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.