brambles, thorny bushes, or blackberry bushes (see Molina)
Orthographic Variants:
quauitztli, quahuitztli
Alonso de Molina:
quauitztli. çarza, o cierto abrojo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 88r. col. 1. Thanks to Joe Campbell for providing the transcription.