tlayelli.

Headword: 
tlayelli.
Principal English Translation: 

something foul, dysentery (see Karttunen); or a bloody stool (see Molina)

Orthographic Variants: 
tlahyelli, tlaelli
IPAspelling: 
tɬɑhyelli
Alonso de Molina: 

tlaelli. cosa suzia, o camaras de sangre.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 120v. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLAHYEL-LI something foul, dysentery / cosa sucia o cámaras de sangre (M) M has this as tlaelli, tlahilli, and tlailli, but the glottal stop and Y are consistently attested across sources. Z has Ā for E. See (I)HYĀYA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 271.

Attestations from sources in English: 

"Tlayelli refers to 'something foul' or to dysentery; it derives from the verb iyaya 'to stink.'"
Louise Burkhart, The Slippery Earth (1989), 105, citing Frances Karttunen.

themes: 
Death
Health, Sickness, Wellness, Medicine
See also: 
tlahilli.