Antonyms for the phrase "builded fire under" could include extinguished, cooled, diffused, disarmed, pacified, and placated. These terms suggest actions opposite to igniting and intensifying a situation. A person can use these antonyms to convey a sense of calmness, reconciliation, or peace. Extinguishing a fire under a person can mean to end an argument, while diffusing a situation can mean to ease tensions. Disarming someone means to remove their hostile intent, while pacifying and placating imply efforts to soothe an agitated or dissatisfied person. Therefore, using these antonyms instead of "builded fire under" can facilitate positive communication and reduce negative emotions.