to misinterpret things, a misunderstanding (literally, backwards understanding) (see Molina)
IPAspelling:
nɑkɑspɑtilkɑki
Alonso de Molina:
nacazpatilcaqui. nic. (pret. onicnacazpatilcac.) entender la cosa al reues. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 062r. col. 2. Thanks to Joe Campbell for providing the transcription.