nasally; or, someone who speaks through the nose (see Molina)
IPAspelling:
jɑkɑkikintik
Alonso de Molina:
yacaquiquintic. gangoso. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 30r. col. 2. Thanks to Joe Campbell for providing the transcription.