陰鬱[inutsu] gloom
鬱積[usseki] accumulation (e.g. of emotions, grievances, etc.)
抗鬱[kouutsu] antidepressant
鬱を散じる[utsuwosanjiru] to chase one's gloom away
鬱陶しい[uttoushii] gloomy (e.g. mood)

鬱病[utsubyou] melancholia
躁鬱[souutsu] manic-depressive (bipolar)
躁鬱病[souutsubyou] manic depression
鬱血[ukketsu] blood congestion
鬱蒼[ussou] thick