tozcatl.

Headword: 
tozcatl.
Principal English Translation: 

throat (but this is more likely tozquitl)
Gran Diccionario Náhuatl, https://gdn.iib.unam.mx/diccionario/tozcatl/16424

Attestations from sources in English: 

voice
Robert Haskett and Stephanie Wood's notes from Nahuatl sessions with James Lockhart and subsequent research.

See also: