"Loose-limbed" is a term used to describe someone who is graceful and moves with ease. There are many synonyms for this term, including supple, lithe and limber. Supple refers to a person who is flexible and adaptable, while limber describes someone who is nimble and pliant. Other synonyms for "loose-limbed" include agile, graceful, fluid, and mobile, all of which refer to the ease and grace with which someone moves. Ultimately, the exact synonym for "loose-limbed" will depend on the context in which it is used, but all of these words share a common thread of describing someone who is fluid and graceful in their movements.