TLAPŌPOYĀHU(I) to get dark / se obscurece (T for compound with ĪX-TLI) [(1)Tp.137]. T also has POPOYACTIC ‘gray, dark, cloudy,’ and M has tlapoyahua for ‘for night to fall.’ See POYĀHU(I). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 293.