rigidity

jäykkyys, kankeus

ankaruus The quality or state of being rigid; want of pliability; the quality of resisting change of form; the amount of resistance with which a body opposes change of form.
stiffness Stiffness of appearance or manner; want of ease or elegance.
In Economics: synonym for sticky stickiness (of prices/wages etc.). Describing the tendency of prices and money wages to adjust to changes in the economy with a certain delay.