to have difficulties when speaking (hesitant, restrained) (see Molina)
Alonso de Molina:
mauhcatlatoliztli. atamiento tal en hablar. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 54r. col. 1. Thanks to Joe Campbell for providing the transcription.