Synonyms of temperamental

1. temperamental: usage: relating to or caused by temperament; "temperamental indifference to neatness"; "temperamental peculiarities"
2. moody, temperamental, emotional (vs. unemotional): usage: subject to sharply varying moods; "a temperamental opera singer"
3. erratic, temperamental, unreliable (vs. reliable), undependable (vs. dependable): usage: likely to perform unpredictably; "erratic winds are the bane of a sailor"; "a temperamental motor; sometimes it would start and sometimes it wouldn't"; "that beautiful but temperamental instrument the flute"- Osbert Lancaster