| a. | 1. | Of or pertaining to temperament; constitutional. |
| Adj. | 1. | temperamental - relating to or caused by temperament; "temperamental indifference to neatness"; "temperamental peculiarities" |
| 2. | temperamental - subject to sharply varying moods; "a temperamental opera singer" Synonyms: moody | |
| 3. | temperamental - 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 Synonyms: erratic |