Double-quick is an adjective used to describe a fast and speedy pace. Antonyms for this word can be slow, sluggish, or snail's pace. These words describe a slower pace, the opposite of the fast movement represented by double-quick. Words like idle, leisurely or unhurried are also antonyms for double-quick, emphasizing a more relaxed and comfortable pace. Moreover, lethargic and slothful refer to a lazy and inactive way of behaving. These are opposite of double-quick, which represents quick and efficient rapidity. Therefore, using appropriate antonyms for double-quick can help convey a different tone and mood in various types of writing contexts.