Antonyms for the word "move restlessly" include words like calm, still, and tranquil. When a person is calm, they are relaxed and composed, exhibiting no agitation or restlessness. Similarly, when a person is still, they are not moving, and are at peace. Tranquil is another word that represents a sense of peaceful, undisturbed calmness. Other antonyms include relaxed, sedate, and serene, all of which convey a sense of peacefulness, quietude, and immobility, opposite to the agitation and turbulence that come with moving restlessly. By choosing the right words, we can communicate the opposite of a specific feeling or action, providing a nuanced vocabulary that better expresses our thoughts and ideas.