lacking elasticity; inflexible, unyielding

The quality of being inflexible. / (economics) The insensitivity of changes in a quantity with respect to changes in another quantity.

In an inelastic way.

plural of inelasticity

(physics) A high-energy nuclear reaction in which two nuclei overlap and exchange energy and nucleons

plural of deep inelastic collision

A situation in which firms/producers can only supply a fixed quantity, hence cannot increase, or decrease the available amount even if there are increases/decreases in price. (Elasticity of supply = 0)