forty cloths, pieces of paper mats, or tortillas, etc. (things that are flat and thin) (see Molina)
IPAspelling:
oːmihpilli
Alonso de Molina:
omipilli. quarenta mantas, pliegos de papel, esteras o tortillas. &c. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 76v. col. 1. Thanks to Joe Campbell for providing the transcription.