stiffness

The inelegance of someone stiff and unrelaxed (as by embarrassment).

Excessive sternness.

Firm resoluteness in purpose or opinion or action.

“a charming host without any touch of stiffness or pomposity”

The physical property of being inflexible and hard to bend.

The property of moving with pain or difficulty.

“he awoke with a painful stiffness in his neck”