something with which one affirms something; or, the authority of a piece of writing for confirming or verifying something (see Molina)
IPAspelling:
tɬɑneltiliːloːni
Alonso de Molina:
tlaneltililoni. cosa para afirmar algo o autoridad de escriptura para confirmar, o verificar algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 128r. col. 1. Thanks to Joe Campbell for providing the transcription.