deform (v.)

c. 1400, deformen, difformen, "to disfigure, mar the natural form or shape of," from Old French deformer (13c.) and directly from Latin deformare "put out of shape, disfigure," from de (see de-) + formare "to shape, fashion, build," also figurative, from forma "form, contour, figure, shape" (see form (n.)). Related: Deformed; deforming.