what is temperamental
temperamental. adj. 1. easily upset or irritated; excitable; volatile. 2. of, relating to, or caused by temperament. 3. working erratically and inconsistently; unreliable: a temperamental sewing machine.(ËtÉm pÉr ÉËmÉn tl, -prÉËmÉn-, -pÉrËmÉn-). adj.emperamental. adj. 1. easily upset or irritated; excitable; volatile. 2. of, relating to, or caused by temperament. 3. working erratically and inconsistently; unreliable: a temperamental sewing machine.