The antonyms for the phrase "quieting down" are many and varied, depending on the context of the phrase. Antonyms for "quieting down" may include words such as escalating, augmenting, enhancing, intensifying, energizing, igniting, stimulating, rejuvenating, invigorating, strengthening, emboldening, or accelerating. These antonyms are often used to describe an increase in the noise level or excitement in a particular environment. In contrast, "quieting down" typically refers to the process of making something more peaceful or tranquil, such as calming down a rowdy crowd, settling a restless baby, or easing the anxieties of a nervous pet.