to injure something with one's finger (see Molina)
IPAspelling:
mɑhpilwiteki
Alonso de Molina:
mapilhuitequi. nitla. (pret. onitlamapilhuitec) herir alguna cosa conel dedo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 52v. col. 1. Thanks to Joe Campbell for providing the transcription.