frailness

He knew the frailness of the bond which kept his body and soul together.

When she talked of her inability to go to night school because of her frailness and weariness, tears flooded her eyes.

It was a mass of cobweb lace of extraordinary antiquity and frailness, mounted on a lining of silver gauze.

This gives one a realizing sense of the frailness of a Mississippi boat and the briefness of its life.

Then as his face suddenly clouded he started forward on the rickety chair with a violence that threatened its frailness.