tlateomatiliztli.

Headword: 
tlateomatiliztli.
Principal English Translation: 

religious devotion, spiritual practice, or ceremony (see Molina and Karttunen)

IPAspelling: 
tɬɑteoːmɑtilistɬi
Alonso de Molina: 

tlateomatiliztli. deuocion, exercicio spiritual, o cerimonia ecclesiastica.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 135v. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLATEŌMATILIZ-TLI religious devotion /devoción, ejercicio espiritual, o ceremonia eclesiástica (M) [(1)Cf.79v]. C marks the vowel of the fifth syllable long, although by general rule it should be short. This is immediately followed in context by TLATEŌTOQUILIZ-TLI, where C also marks the corresponding vowel long. See TEŌMAT(I).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 296.

Attestations from sources in English: 

tlateomatiliztli = "'devotion'...'thinking or being concerned with a deity.'"
David Tavárez, The Invisible War: Indigenous Devotions, Discipline, and Dissent in Colonial Mexico (Stanford: Stanford University Press, 2011), 15.