1. Flexible, limber, pliant refer to that which bends easily. Flexible refers to that which is capable of being bent and adds sometimes the idea of compressibility or expansibility: a flexible piece of rubber hose. Limber is especially applied to the body to refer to ease of movement; it resembles flexible except that there is an idea of even greater ease in bending: a limber dancer. Pliant stresses an inherent quality or tendency to bend that does not require force or pressure from the outside; it may mean merely adaptable or may have a derogatory sense: a pliant character.

Did you mean inflexible?