iztlacapaxoch.

Headword: 
iztlacapaxoch.
Principal English Translation: 

a big lie, falsehood; a word only used by women

IPAspelling: 
istɬɑkɑpɑʃoːtʃ
Alonso de Molina: 

iztlacapaxoch. gran mentira dizen solas las mugeres.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 49v. col. 1. Thanks to Joe Campbell for providing the transcription.