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 निगीर्ण
निगीर्णnigīrṇap. p.Swallowed, devoured.
Swallowed, devoured.
(Fig.) Completely swallowed or absorbed, hidden, comcealed and hence to be supplied; उपमानेनान्तर्निगीर्णस्योपमेयस्य यदध्यवसानं सैका K. Parasmaipada1.
Derived forms and compounds
-चारिन्Adjective walking concealed or in disguise; Ms.9.26.