slow

When used as an adjective, "slow" describes speed or time. For example, a "slow walker" moves at a low speed, while a "slow process" takes a long time to finish. When used as a verb, it often appears with the word "down" (slow down) to describe the act of reducing speed. While "slowed" is common, remember that in casual speech, people sometimes use "slow" as an adverb, though "slowly" is more grammatically correct for formal writing.