copactli.

Headword: 
copactli.
Principal English Translation: 

the palate, the roof of the mouth (see Molina)

IPAspelling: 
kopɑːktɬi
Alonso de Molina: 

copactli. el paladar.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 24v. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

COPĀC-TLI palate, throat / el palador (M), garganta (T) [(1)Tp.128].
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 41.

Attestations from sources in English: 

copactli, in copactli = palate, the palate (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 10 -- The People, No. 14, Part 11, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 107.

themes: 
Anatomy