暗欝[anutsu] gloom
陰欝[inutsu] gloom
欝積[usseki] accumulation (e.g. of emotions, grievances, etc.)
憂欝症[yuuutsushou] melancholia
躁欝病[souutsubyou] manic depression

欝血[ukketsu] blood congestion
欝蒼[ussou] thick
欝憤[uppun] resentment
悒欝[yuuutsu] depression
欝金[ukon] turmeric (Curcuma domestica)

ゴミ集積場[gomishuusekijou] village garbage collection point
欝積[usseki] accumulation (e.g. of emotions, grievances, etc.)
沖積[chuuseki] alluvial
沖積期[chuusekiki] alluvial period
沖積世[chuusekisei] alluvial epoch (i.e. the Holocene epoch)

沖積層[chuusekisou] alluvium
沖積土[chuusekido] alluvial soil
下積み[shitazumi] lowest social strata
求積[kyuuseki] mensuration
経路積分[keirosekibun] path integral (physics)