When describing a decrease in speed, there are many variations to the phrase "more slowed." Here are some alternatives: decelerated, sluggish, decelerating, crawling, easing up, slowing down, retarding, coasting, lessening speed, dwindling. Depending on the context and intensity of the deceleration, each of these words can be used to convey various degrees of reduced speed. For example, "crawling" suggests a near stop, while "easing up" implies a gradual reduction. Choosing a synonym that fits the situation can add depth and specificity to your language.