shame or embarrassment (making one's face turn red)
IPAspelling:
iːʃtɬɑtɬɑktilistɬi
Alonso de Molina:
ixtlatlactiliztli. verguenza y empacho tal, Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 48r. col. 2. Thanks to Joe Campbell for providing the transcription.