to nod, to shake one’s head (see Karttunen)
CUĀHUĪHUĪCA vrefl to nod, to shake one’s head / cabecea ... lo menea (la cabeza) (Z) [(3)Zp.22,83,169]. See CUĀ(I)-TL, HUĪHUĪCA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 58.