"Give Cold Shoulder" is a common idiom used to describe the act of being indifferent or unresponsive to someone. The antonyms for this phrase can vary depending on the context in which it is being used. Some possible antonyms may include being kind, responsive, welcoming, friendly, warm, hospitable, welcoming, or inviting. These words suggest an act of openness towards someone, showing that you are willing to engage in conversation or socialize with them. Overall, the antonyms of "give cold shoulder" describe actions that promote inclusion and connection rather than exclusion and distancing.