POYĀHU(I) to darken / obscurecerse (K) [(1)Tp.137,(2)Zp.82,164]. This is attested in Z in the form ĪXPOYĀHU(I) 'to be dizzy' and in T in ĪXTLAPŌPOYĀHU(I) 'to get dark.' See POYĀHU(A). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 204.