WordNet sense 1 (moving and bending with ease):

lithe, slender, supple, svelte, sylphlike

WordNet sense 2 (graceful and pleasing):

gainly

WordNet sense 3 (smooth and unconstrained in movement):

smooth

WordNet sense 4 (displaying effortless beauty and simplicity in movement or execution):

elegant

WordNet sense 5 (suggesting taste, ease, and wealth):

refined