to scrub one’s head (see Karttunen)
CUĀPAHPĀC(A) vrefl to scrub one’s head / se lava la cabeza (Z) [(2)Zp.67,169]. See CUĀ(I)-TL, PAHPĀC(A). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 60.