ɪˈɹætɪk məːˈkjʊə.ɹɪ.əl mɝˈkjʊ.ɹi.əl ˈkwɪkˌsɪlvɚ liable to sudden unpredictable change erratic behavior fickle weather mercurial twists of temperament a quicksilver character, cool and willful at one moment, utterly fragile the next relating to or containing or caused by mercury mercurial preparations mercurial sore mouth