for wheat pr something similar to fall and disperse itself on the ground (see Molina)
Orthographic Variants:
chayaua
Alonso de Molina:
chayaua. nitla. (pret. onitlachayauh.) esparzir o derramar por el suelo trigo, o cosa semejante. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 19r. col. 1. Thanks to Joe Campbell for providing the transcription.