To change the form of (something), usually thus making it disordered or irregular; to give (something) an abnormal or unusual shape.
To alter the shape of (something) by applying a force or stress.
To change the look of (something), usually thus making it imperfect or unattractive; to give (something) an abnormal or unusual appearance.
To become changed in shape or misshapen.
To mar the character or quality of (something).
Having an unusual and unattractive shape; deformed, misshapen; hence, hideous, ugly.