The phrase, "rattle one's cage" refers to making someone angry or upset. Antonyms for this phrase could be calm down, soothe, or placate. Instead of intentionally riling someone up, these actions would work towards easing tension and restoring peace. Other antonyms could include ignore or avoid, which involve not engaging in actions that may provoke negative emotions. Another option could be to collaborate and cooperate, creating a positive environment and avoiding conflict altogether. Understanding antonyms to phrases like "rattle one's cage" can assist in more effective communication and conflict resolution.