something left unprotected; or something left undone as a result of carelessness and negligence (see Molina)
Orthographic Variants:
tlaxiccaualli
Alonso de Molina:
tlaxiccaualli. cosa desamparada o cosa dexada de hazer por descuido y negligencia. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 145v. col. 2. Thanks to Joe Campbell for providing the transcription.