deform

Short definition from Wiktionary

Adjective

1. 1
   Having an unusual and unattractive shape; deformed, misshapen; hence, hideous, ugly.

Verb

1. 1
   To change the form of (something), usually thus making it disordered or irregular; to give (something) an abnormal or unusual shape.
2. 2
   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.
3. 3
   To change the look of (something), usually thus making it imperfect or unattractive; to give (something) an abnormal or unusual appearance.
4. 4
   To mar the character or quality of (something).
5. 5
   To become changed in shape or misshapen.