The phrase "works out a deal" means to negotiate and finalize an agreement between two parties. The antonyms for this phrase could be "rejects an offer," "disagrees with terms," or "fails to reach an agreement." In some cases, the parties may not be able to come to an understanding due to conflicting interests, which might lead to a breakdown in negotiations. Alternatively, one party may reject the other party's offer or demand unacceptable terms, leading the other party to decline the agreement. Overall, antonyms for "works out a deal" signify a failure to make an agreement or inability to negotiate.