tlalchi.

Headword: 
tlalchi.
Principal English Translation: 

on the ground, toward the ground (see Molina)

IPAspelling: 
tɬɑːltʃi
Alonso de Molina: 

tlalchi. enel suelo.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 123v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLĀLCHI on or towards the ground, down / en el suelo (M), en o hacia el suelo (C) This is abundantly attested in C as the opposite of AHCO. See TLĀL-LI.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 273–274.

Horacio Carochi / English: 

tlālchi = on or toward the ground
Horacio Carochi, S.J., Grammar of the Mexican language with an explanation of its adverbs (1645), translated and edited with commentary by James Lockhart, UCLA Latin American Studies Volume 89 (Stanford: Stanford University Press, UCLA Latin American Center Publications, 2001), 513.