stiffness
//ˈstɪf.nəs//
Noun
stiffnessSingular
1
The quality or state of being rigid and resistant to bending or flexing.
The stiffness of the metal makes it difficult to bend.
2
A condition of muscles or joints characterized by difficulty in movement, often accompanied by pain or discomfort.
I felt some stiffness in my neck after sleeping in an awkward position.
3
Lack of ease, warmth, or friendliness in manner or behavior; formality.
There was a certain stiffness in his manner that made guests feel uncomfortable.
4
The degree to which something resists deformation when force is applied; a measure of rigidity in physics and engineering.
The stiffness of the steel beam determines how much it will bend under load.