for something to be half dead, agonizing, about to expire (see Molina)
Orthographic Variants:
çaquenquimattoc
Alonso de Molina:
zaquenquimattoc. lo mesmo es que zaquen zazauintoc. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 15r. col. 1. Thanks to Joe Campbell for providing the transcription.