temperamental

Adjective
  1. Relating to or caused by temperament (synset 302821491)
    "temperamental indifference to neatness"; "temperamental peculiarities"
  2. Subject to sharply varying moods (synset 300859512)
    "a temperamental opera singer"
    similar to: emotional - of more than usual emotion
    same as: moody
  3. Likely to perform unpredictably (synset 300728671)
    "erratic winds are the bane of a sailor"; "a temperamental motor; sometimes it would start and sometimes it wouldn't"; "that beautiful but temperamental instrument the flute"
    similar to: undependable, unreliable - not worthy of reliance or trust
    same as: erratic

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