णṇa1 Knowledge.
[There are hardly any words in real use in Sanskrit beginning with ण. Many roots which, in the Dhātupāṭha, are written with an initial ण really begin with न. They are so written to show that the न is liable to be changed to ण when preceded by prepositions, like प्र, परि, अन्तर् etc.]त
Derived forms and compounds