for the child to grow; for something to grow or get fat; or, for corn or cocoa to come in season (see Molina)
Orthographic Variants:
chamaua
Alonso de Molina:
chamaua. ni. (pret. onichamauac.) crecer el niño, o comenzar a estar de sazon la mazorca de mayz, o de cacao. 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.