The antonyms for the phrase "rattles cage" could be "calm", "relax", "soothe", "pacify", "placate", "appease", "assuage", or "quiet". These words denote a state of tranquility, serenity, and peace, in contrast to the restless and agitated state implied by "rattles cage". When we use these antonyms, we indicate that we want to avoid causing agitation, tension, or upset in others, and instead strive to create a harmonious and peaceful environment. It's important to select our words carefully, as they can have a profound impact on our relationships and interactions with others.