temperamental

Definitions

Liable to unreasonable changes of mood.

Displaying a volatile or unpredictable nature.

Relating to a person's temperament or emotional makeup.

Examples

The temperamental weather made it difficult to plan an outdoor wedding.

My old car is quite temperamental and often refuses to start on cold mornings.

Synonyms

moody volatile erratic unpredictable capricious mercurial fickle

Antonyms

stable even-tempered consistent reliable steady composed placid