capable of being bent or folded without creases, cracks, or breaks; pliant
supple leather
able to perform bending or twisting movements with ease and grace; lithe
the supple legs of a dancer
compliant, often to the point of submissiveness
supplely /ʹsuplli/ adv
suppleness noun
supply /ʹsupli/ adv
[Middle English souple via Old French from Latin supplic-, supplex submissive, suppliant, bending under, from sub- + plicare to fold]