temperamental

Meanings

1. 1
   adj

   Having moods that change suddenly and unpredictably.

   The temperamental singer stormed off stage when the lights went wrong.

2. 2
   adj

   Working in an unreliable, unpredictable way (of a machine or device).

   The old printer is temperamental and only works when it feels like it.

3. 3
   adj

   Relating to or caused by a person's natural character.

   The two brothers had a temperamental difference that no one could change.

From temperament + -al.

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