piciloa.

Headword: 
piciloa.
IPAspelling: 
pisiːloɑː
Alonso de Molina: 

piciloa. nitla. (pret. onitlapicilo.) desbastar o achicar cosas grandes y redondas.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 81v. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

PICĪLOĀ vt to wear something down, to make large, round things smaller, to grind something fine / desbastar o achicar cosas grandes y redondas (M) This is implied by PICĪLTIC. X has TLAPICĪLOĀ 'to rain' and a derived noun meaning '(rain)drop.'
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 193.