cochiliztli.

Headword: 
cochiliztli.
Principal English Translation: 

sleepiness or tiredness that leads to sleep (see Molina)

IPAspelling: 
kotʃilistɬi
Alonso de Molina: 

cochiliztli. sueño del que duerme.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 23r. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

COCHILIZ-TLI sleep, dream / sueño del que duerme (M) [(2)Tp.116,135,(1)Zp.145]. One of the Z attestations has the vowel of the third syllable long, and the other has the vowels of both the second and third syllables long, but neither syllable should contain long vowels. See COCH(I).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 37.