The phrase "art buoyant" is typically used to describe a style of art that is energetic, lively, and cheerful. Antonyms for this phrase could include words such as stagnant, heavy, or melancholy. Other antonyms for "art buoyant" might be cold, lifeless, or monotonous, depending on the context in which the phrase is being used. Additionally, words like sad, dreary, or dull may also be considered antonyms, as they connote a lack of energy and enthusiasm that is typically associated with the buoyancy and vibrancy of "art buoyant." Overall, the antonyms for "art buoyant" serve to emphasize the contrast between a lively and energetic art style and one that is more subdued or melancholic.