temperamental

adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about temperamental at Wordnik → Where our words come from →

1. Relating to or caused by temperament.

   temperamental indifference to neatness

2. Subject to sharply varying moods.

   a temperamental opera singer

3. Likely to perform unpredictably.

   erratic winds are the bane of a sailor