thing with which one protects him or herself (see Molina)
Alonso de Molina:
icnetzacuiliztli. amparo del que se ampara con algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 33r. col. 1. Thanks to Joe Campbell for providing the transcription.