The term "hammers out a deal" implies negotiation, compromise, and persistence. Antonyms for this phrase could include "fails to reach an agreement," "gives up easily," or "avoids confrontation." These types of phrases indicate a lack of effort or determination in seeking a solution or compromise. Alternatively, antonyms for the phrase could include "swiftly agrees," "easily consents," or "meekly surrenders." These types of phrases imply an effortless and perhaps overly agreeable approach to negotiation, without enough consideration for one's own interests or priorities. Ultimately, finding a balance between assertiveness and flexibility is crucial in any negotiation process.