to become bit by bit, in bad condition without letting on, and to be bitter hearted (see Molina)
Orthographic Variants:
çaniuhnenti ynchichixtiuh noyollo
Alonso de Molina:
zaniuhnenti ynchichixtiuh noyollo. hazerse poco apoco, o sin aduertir de mala condicion, y de amargo corazon. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 14v. col. 1. Thanks to Joe Campbell for providing the transcription.