to ripen or to wither (speaking of crops) (see Molina)
Orthographic Variants:
tlachicaua
Alonso de Molina:
tlachicaua. sazonarse o agostarse las sembradas. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 117r. col. 1. Thanks to Joe Campbell for providing the transcription.