उपक्रमितृupakramitṛa.(P.VII.2.36.) One who begins &c.
(ParasmaipadaVII.2.36.) One who begins etc.
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.