to become nothing, to end up as nothing (see Molina)
IPAspelling:
ɑhtɬehti
Alonso de Molina:
atleti. n. (pret. onatletix.) tornarse en nada. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 8v. col. 2. Thanks to Joe Campbell for providing the transcription.