The power of resisting displacement constitutes stability, the power of each piece to resist disfigurement is its stiffness; and its power to resist breaking, its strength.
Because the disfigurement of their skin, though often temporary, is sometimes quite pronounced, children will turn inward, avoiding contact with friends or relatives.
I understand why a person would have cosmetic surgery for some serious disfigurement.
Disfigurement does not occur although hearing and visual problems are typical.
The effect of the pressures applied to a piece, consisting of the load and the sispporting resistances, is to force the piece into a state of strain or disfigurement, which increases until the elasticity, or resistance to strain, of the material causes it to exert a stress, or effort to recover its figure, equal and opposite to the system of applied pressures.