Adjective temperamental has 3 senses
  1. temperamental - relating to or caused by temperament; "temperamental indifference to neatness"; "temperamental peculiarities"
  2. moody, temperamental - subject to sharply varying moods; "a temperamental opera singer"
    Antonym: unemotional (indirect, via emotional)
  3. erratic, temperamental - likely to perform unpredictably; "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"- Osbert Lancaster
    Antonyms: reliable, dependable (indirect, via unreliable, undependable)
    Antonyms: reliable, dependable (indirect, via unreliable, undependable)
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