tzoncalli.

Headword: 
tzoncalli.
Principal English Translation: 

hair; head of hair; scalp; wig; headdress

IPAspelling: 
tsonkɑlli
Alonso de Molina: 

tzoncalli. cabellera.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 153r. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

ihuitzoncalli = feather headdress or feather wig
Justyna Olko, Turquoise Diadems and Staffs of Office: Elite Costume and Insignia of Power in Aztec and Early Colonial Mexico (Warsaw: Polish Society for Latin American Studies and Centre for Studies on the Classical Tradition, University of Warsaw, 2005), 158.

Tzonpachpul, cuitlanexpul: vel achi itzoncal ticlalilia. Inin tlatolli: itechpa mitoa in aquin cauilquixtia in itlatocauh, anozo itepachocauh = Unkempt and filthy; or, Straighten your wig a little! This is said to a person who derides his king or ruler Thelma D. Sullivan, "Nahuatl Proverbs, Conundrums, and Metaphors, Collected by Sahagún," Estudios de Cultura Náhuatl 4 (1963), 142–143.