to go about on one's hands and knees (see Molina)
cocoyonenemi. ni. (pret. onicocoyonenen.) andar agatas. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 23v. col. 1. Thanks to Joe Campbell for providing the transcription.