Main Entry: tem·per·a·men·tal

Pronunciation: \ˌtem-p(ə-)rə-ˈmen-t^əl, ˌtem-pər-ˈ\

Function: adjective

Date: 1646

1 : of, relating to, or arising from temperament : constitutional <temperamental peculiarities>
2 a : marked by excessive sensitivity and impulsive mood changes <a temperamental child> b : unpredictable in behavior or performance <a temperamental computer>

— tem·per·a·men·tal·ly \-t^əl-ē\ adverb