tlatlatilli.

Headword: 
tlatlatilli.
Principal English Translation: 

something hidden, secret, quiet; or, burned

Alonso de Molina: 

tlatlatilli. cosa escondida, o secreta, callada, o quemada.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 139r. col. 2. Thanks to Joe Campbell for providing the transcription.

Lockhart’s Nahuatl as Written: 

something hidden; patientive noun from tlātia.
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 238.