The antonyms for the word "most fluttering" denote a lack of excitement, agitation, or commotion. The opposite of this phrase could be words like calm, still, composed, peaceful, sedate, and placid. These words describe a state of serenity, tranquility or composure that is devoid of any intense physical or emotional reactions. They generally invoke a sense of relaxation, composure, and peacefulness. While most fluttering refers to an abundant, lively, or agitated state, antonyms to this phrase represent a subdued, calm, and tranquil state of being. Using these antonyms in the right context can help to convey a sense of peacefulness, composure, and relaxation.