Fleetfooted refers to being nimble, quick, and agile on one's feet. Its antonyms, on the other hand, describe slowness, clumsiness, or lethargy. The opposite of fleetfooted could be described as being plodding, sluggish, or lumbering. Someone who is fleetfooted might be called graceful, but if someone is awkward, they are not graceful. The antonyms could also include being unathletic or physically challenged. The opposite of nimble could be described as being uncoordinated or bumbling. In summary, while fleetfooted describes someone who is quick and agile, its antonyms describe someone who is slow, clumsy, or awkward.