The word "re-buffing" means to refuse or reject someone or something. Some antonyms for "re-buffing" are "accepting," "welcoming," "embracing," "approving," "reciprocating," and "endorsing." When we accept something or someone, we are willing to receive and consider it or them. Similarly, when we welcome or embrace something, we are happy and willing to accept it or them. Approving and endorsing something means giving it a seal of approval, indicating that we support and believe in it. Reciprocating involves responding to a gesture or action in a like-for-like manner, indicating a mutual understanding and acceptance. So, if we want to communicate the opposite meaning of re-buffing, we can use these antonyms along with other appropriate words.