What is another word for unseriousness?
Pronunciation: [ʌnsˈi͡əɹɪəsnəs] (IPA) 
Unseriousness is a lack of gravitas or seriousness, typically exhibited in behavior or speech. Synonyms for unseriousness include frivolousness, lightness, carelessness, levity, flippancy, and lightheartedness. These terms signify a disregard for seriousness, and might suggest a failure to take important matters seriously or a tendency to view life in a trivial or superficial way. Other synonyms include jocularity, playfulness, amusement, and giddiness, all of which denote a sense of enjoyment or fun rather than a sense of responsibility or gravity. Regardless of the specific connotations of any given synonym, when people exhibit unseriousness, they are often seen as unserious people.
