tlaniuic. hazia baxo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 129r. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
TLANIHUĪC downwards / hacia abajo (M) [(1)Cf.93v]. See TLANI, -HUĪC. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 286.