tlalcueponia.

Headword: 
tlalcueponia.
Principal English Translation: 

to fall to the ground (see Karttunen)

Orthographic Variants: 
tlālcuepōniā
IPAspelling: 
tɬɑːlkwepoːniɑː
Frances Karttunen: 

TLĀLCUEPŌNIĀ vrefl to fall to the ground / se cae al suelo (T) [(3)Tp.160]. This seems to imply making a thundering noise in falling. See TLĀL-LI, CUEPŌNIĀ.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 274.