irregular, outside the norm, or privileged (see Molina)
Orthographic Variants:
anauatilpiani
Alonso de Molina:
anauatilpiani. irregular, o priuilegiado. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 6r. col. 1. Thanks to Joe Campbell for providing the transcription.