All convivial antonyms

adj convivial

• unfriendly — not amicable; not friendly or kindly in disposition; unsympathetic; aloof: an unfriendly coldness of manner.
• apathetic — If you describe someone as apathetic, you are criticizing them because they do not seem to be interested in or enthusiastic about doing anything.
• lethargic — of, relating to, or affected with lethargy; drowsy; sluggish; apathetic.
• blah — You use blah, blah, blah to refer to something that is said or written without giving the actual words, because you think that they are boring or unimportant.
• staid — of settled or sedate character; not flighty or capricious.
• unhappy — sad; miserable; wretched: Why is she so unhappy?
• depressed — If you are depressed, you are sad and feel that you cannot enjoy anything, because your situation is so difficult and unpleasant.
• gloomy — dark or dim; deeply shaded: gloomy skies.
• sad — Systems Analysis Definition
• dull — not sharp; blunt: a dull knife.
• serious — of, showing, or characterized by deep thought.
• solemn — grave, sober, or mirthless, as a person, the face, speech, tone, or mood: solemn remarks.