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

下渋り[shitashiburi] (stock market) steadiness
苦渋[kujuu] bitterness
渋い[shibui] astringent
渋る[shiburu] to hesitate
渋柿[shibugaki] astringent persimmon

渋滞[juutai] congestion (e.g. traffic)
渋味[shibumi] good taste
出し渋る[dashishiburu] to grudge
出渋る[deshiburu] to be unwilling to go out
難渋[nanjuu] retardation