The phrase "freeze out" generally means to exclude or isolate someone or something. Antonyms of the phrase might include terms like include, embrace, welcome, invite or encompass. If you want to compliment someone, you might tell them that you specifically wanted to include them in the activity, for example. Or, if you're feeling generous, you might want to extend an invitation to someone to join in on the fun. Rather than isolating someone or making them feel left out, the goal might be to make them feel valued and included as part of the group. By using synonyms and antonyms for "freeze out," you can express your intentions to be welcoming and inclusive.