centzonteti.

Headword: 
centzonteti.
Principal English Translation: 

to become hardened or obstinate (see Molina)

Orthographic Variants: 
centzunteti
Alonso de Molina: 

centzunteti. ni. (pret. onicentzuntet.) endurecerse o obstinarse.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 18r. col. 2. Thanks to Joe Campbell for providing the transcription.