to cause something to make a thundering sound (see Karttunen)
CUEPŌNIĀ vt to cause something to make a thundering sound / lo truena (T) This is abundantly attested, but only in T. See CUEPŌN(I).
CUEPŌNILIĀ applic. CUEPŌNIĀ Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 70.