to make something shine, to polish an object (see Molina)
IPAspelling:
petsoɑː
Alonso de Molina:
petzoa. nitla. (pret. onitlapetzo.) acecalar bruñir, o luzir algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 81r. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
PETZOĀ vt to polish, burnish something, to make something smooth and shiny / acicalar, bruñir, o lucir algo (M) [(9)Tp.148]. See PETZ-TLI.
PETZŌLŌ nonact. PETZOĀ.
PETZOLHUIĀ altern. applic. PETZOĀ.
PETZALHUIĀ altern. applic. PETZOĀ.
PETZALHUILIĀ applic. PETZALHUIĀ.
PETZALHUĪLŌ nonact. PETZALHUIĀ. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 192.