"came back at" can be defined as a phrase that indicates a verbal or physical attack or retaliation towards someone or something. It signifies a negative or harsh response in a conversation or situation. However, the antonyms of "came back at" would be phrases that indicate positive or neutral responses, such as "replied kindly," "responded calmly," "answered rationally," "countered respectfully," "reacted diplomatically," or "retorted politely." Using antonyms in communication can help avoid conflict and maintain healthy relationships by promoting understanding and compassion towards others. It's essential to choose your words wisely and respond thoughtfully to avoid misunderstandings and negative outcomes.