to be distracted or pensive, not paying attention to what people say (see Molina, who conjugates the verb in the first person singular ni-)
Alonso de Molina:
aye niquilhuitica. estar abouado o pensatiuo, no aduertiendo alo que le dizen. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 3v. col. 1. Thanks to Joe Campbell for providing the transcription.