Most halted is a word that denotes stopping or pausing. Therefore, the antonyms for most halted would be words that express movement, activity, or progression. Some possible antonyms for most halted are "accelerated," "advanced," "continued," "expanded," "flowing," "increased," "ongoing," "progressive," "proliferating," "surging," "thriving," and "uninterrupted." These words convey a sense of dynamic motion and development, which stands in stark contrast to the idea of coming to a halt or stopping altogether. When things are most halted, progress is limited, but when they are in motion, possibilities and opportunities are endless.