cyclothymia a temperament characterized by cyclic alterations of mood between elation and depression. —cyclothyme, n. —cyclothymic, adj. dysphoria a state or mood of dissatisfaction, restlessness, or anxiety. —dysphoric, adj. euphoria a state or mood of well being, whether natural or induced. —euphoric, adj. morbidity the state or quality of being excessively gloomy. —morbid, adj. mordancy the quality or state of being sarcastic or caustic. —mordant, adj. morosity the quality or state of being excessively sullen or gloomy. —morose, adj. plerophory a state or quality of full confidence or absolute certainty.