tempestuousness n a state of wild storminess n a state of agitation or turbulent change or development Usage(s) Emotions are so consistently overwrought that tempestuousness is soon diminished to nagging petulance. The Japanese Government was rumored to have entered an official protest against the "unwarranted tempestuousness" of the Ambassador. Now, apparently, Evgeny has decided her virtuosity on the ice is not enough compensation for her tempestuousness off it. Synonym(s) agitation ferment fermentation unrest