The phrase "hang something on" refers to attaching an idea or accusation to a person or thing. Antonyms for this phrase could include "exonerate," "absolve," "vindicate," or "clear." These terms indicate that the person or thing in question is being freed from any blame or responsibility for the situation. Other antonyms might include "unrelated," "unconnected," "unattached," or "unaffiliated." These words convey the idea that no connection exists between the facts of the situation and the person or thing being discussed. By using antonyms for "hang something on," we can better communicate our ideas and ensure clarity in our language.