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 निवत्
निवत्nivatf.A valley.
A valley.
Depth.
Derived forms and compounds
-ताIndeclinable Downwards (also निवना in this sense).