only this, or just this one, or this is all there is, this is the only one left
Orthographic Variants:
ça yyo
Alonso de Molina:
za yyo. solo este, o solo esto. s. ha quedado, o solo esto ay. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 13v. col. 2. Thanks to Joe Campbell for providing the transcription.