The phrase "put the freeze on" is an idiom that means to stop or prohibit something. Its antonyms, or words that have the opposite meaning, would be phrases like "allow," "permit," "encourage," or "support." These words indicate a sense of openness or approval towards something rather than a restriction. They are often used in contexts where there is a need to allow or promote an activity, such as in business, education, or social interactions. By using these antonyms, we can convey a positive or permissive attitude towards a situation, rather than a negative or restrictive one.