in ic.

Headword: 
in ic.
Principal English Translation: 

(points to the manner, the nature of the action or the instrument under reference)

Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 131.

Attestations from sources in English: 

Cualli in ic titlàtoa = It's a nice manner that you're (s.) talking in, your (s.) manner of talking is nice
Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 131.