to make something become acidic or sour (see Molina)
IPAspelling:
ʃokoliɑ
Alonso de Molina:
xocolia. nitla. (pret. onitlaxocoli.) azedar o auinagrar algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 160v. col. 1. Thanks to Joe Campbell for providing the transcription.