to bring into tune or into the same key those who are singing (see Molina)
hoarseness (see Molina and Siméon)
to bring into tune those who are singing, or to approximate the voice of another while singing (see Molina)
the uvula in the throat (see Molina and Sahagún)
throat (but this is more likely tozquitl) Gran Diccionario Náhuatl, https://gdn.iib.unam.mx/diccionario/tozcatl/16424
to belt out one's voice, or to sing fast and high (see Molina)
hummingbird Gran Diccionario Náhuatl, https://gdn.iib.unam.mx/diccionario/tozcatle/74777