adjective
(obsolete except poetic) Having an unusual and unattractive shape; deformed, misshapen; hence, hideous, ugly.
verb
To change the form of (something), usually thus making it disordered or irregular; to give (something) an abnormal or unusual shape.
To change the look of (something), usually thus making it imperfect or unattractive; to give (something) an abnormal or unusual appearance.
To mar the character or quality of (something).
(intransitive) To become changed in shape or misshapen.