Most buckram refers to something that is stiff, formal, or pompous. The antonyms of this word include flexible, informal, and relaxed. Flexibility suggests the absence of rigidity, allowing for free movement or adaptation. Informality describes something that is casual, relaxed or spontaneous, lacking formality or strict adherence to rules. A relaxed atmosphere implies a light-hearted or easy-going manner, without formality or pretentiousness. When it comes to communication, speaking in a relaxed tone would be the opposite of speaking in a most buckram tone. Overall, the antonyms of most buckram convey a sense of freedom, ease, and informality.