冥い[kurai] dark
頑冥[ganmei] bigotry
冥王星[meiousei] Pluto (dwarf planet)
冥界[meikai] hades
冥境[meikyou] shades of the dead

冥途[meido] Hades
冥罰[meibatsu] retribution
冥府[meifu] hades
冥福[meifuku] happiness in the next world
冥利[myouri] providence

大晦日[oomisoka] New Year's Eve
韜晦[toukai] hidden (talents, etc.)
晦渋[kaijuu] ambiguous
晦冥[kaimei] darkness
大晦[ootsugomori] the last day of the year

晦ます[kuramasu] to abscond
晦む[kuramu] to be dazzled by
自己韜晦[jikotoukai] concealing one's talents, position, status, intentions, etc.
天地晦冥[tenchikaimei] The world is covered in darkness