निधानम्nidhānam1 Putting down, laying down, depositing.
प्रभवः प्रलयः स्थानं निधानं बीजमव्ययम् ॥
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.