tetlailti.

Headword: 
tetlailti.
Principal English Translation: 

something that becomes disgusting or abhorrent (see Molina; tentative translation here to English by Stephanie Wood)

Alonso de Molina: 

tetlailti. cosa que pone asco, o cosa aborrecible.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 108r. col. 2. Thanks to Joe Campbell for providing the transcription.