Temperamental

//ˌtɛmp(ə)ɹəˈmɛntl̩// adj

Definitions

Adjective
  1. 1
    Of, related to, or caused by temperament. not-comparable
  2. 2
    Subject to changing and unpredictable emotional states; moody, capricious.
  3. 3
    User-unfriendly, unstable, that is complicated or has poorly written instructions and is subsequently difficult to operate; unpredictable and erratic. figuratively
Adjective
  1. 1
    likely to perform unpredictably wordnet
  2. 2
    subject to sharply varying moods wordnet
  3. 3
    relating to or caused by temperament wordnet

Etymology

From temperament + -al.

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