The phrase "footloose and fancy-free" describes someone who is carefree and unconstrained. Its antonyms, on the other hand, depict qualities of restraint and responsibility. One antonym of footloose is "tied down," which suggests being restricted, bound, or obligated to something or someone. Fancy-free can be contrasted with "burdened," which connotes carrying heavy responsibilities, worries, or problems. Another antonym for fancy-free is "cautious," which denotes a careful approach and avoidance of risks. Taken together, the opposites of footloose and fancy-free suggest a person who is careful, responsible, and reliable, and is willing to trade freedom for security and stability.