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Noun: moodiness  moo-dee-nus
  1. Having temperamental and changeable moods
    "His moodiness made it difficult for others to work with him"
     
  2. A sullen gloomy feeling
    "Her moodiness made it difficult for others to work with her"

Type of: disposition, distemper, ill humor [US], ill humour [Brit, Cdn], temperament