to speak with caution or to pretend something (see Molina)
Orthographic Variants:
nauallatoa
Alonso de Molina:
nauallatoa. ni. (pret. oninauallato.) hablar con cautela o fingidamente. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 063v. col. 1. Thanks to Joe Campbell for providing the transcription.