"Set-to" is a phrase used to describe a quarrel, argument, or fight. The antonyms for this phrase would be harmonious, peaceful, conciliatory, cooperative, and amicable. These words convey the opposite of conflict and suggest an atmosphere of collaboration and mutual respect. Instead of a set-to, people would be engaged in a calm and constructive dialogue. Antonyms of set-to can be particularly useful when trying to de-escalate a tense situation and foster positive communication. By choosing words that emphasize harmony and cooperation, it is possible to move towards a more productive and collaborative outcome.