a walker; or, the stain or spot that has spread very much (see Molina)
IPAspelling:
ohtɬɑtokɑk
Alonso de Molina:
otlatocac. caminante, o la mancha que acundido mucho. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 78r. col. 1. Thanks to Joe Campbell for providing the transcription.