to break through in a battle; or to penetrate a large group of people (see Molina)
IPAspelling:
petɬɑtikɑlɑki
Alonso de Molina:
petlaticalaqui. nite. (pret. onitepetlaticalac.) romper batalla, o hender y meterse entre mucha gente. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 81r. col. 1. Thanks to Joe Campbell for providing the transcription.