鬱気 is read as うっき (ukki) and means gloomy.
うっき
ukki
うっとうしい
gloomy (e.g. mood)
うつ
luxuriant (of vegetation)
ふいんき
(Earth's) atmosphere
しっき
moisture
かんき
chill
のんき
carefree
いやき
dislike
けいき
good (economic) times
かっき
energy
くうき
air
にんき
popularity
つよき
bullish