Of all the folk alive he is the most rigid.

He must make up for it now by the most rigid economy.

With the most rigid economy he would not have more than a hundred pounds left then.

She is most rigid about letting anyone wait at a table for a friend.

Time travel would naturally be based on the most rigid mechanical laws.

"If we put a gun to her head she would sing all day," suggests the most rigid of them.

Children 8 to 12 years old are the most rigid, rule-driven group.

They needed the best and most rigid of medical protection.

Only the most rigid control kept him from calling the guard.

The product meets the most rigid health and ecological standards.