अतज्झatajjhaa.Not knowing that (तत् i. e. Brahman).
[न तत्-जानाति]
Not knowing that (तत् id est, that is Brahman).
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.