cracks, holes, openings, gaps, splits, or crevices (see Molina)
Alonso de Molina:
tzatzayanaliztli. resquebrajaduras, aberturas o hendeduras. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 151v. col. 2. Thanks to Joe Campbell for providing the transcription.