Wordnet 3.0
VERB (1)
1.
make ugly;
The Collaborative International Dictionary of English v.0.48:
Uglify \Ug"li*fy\, v. t. [Ugly + -fy.]
To disfigure; to make ugly. [R.] --Mad. D'Arblay.
[1913 Webster]
WordNet (r) 3.0 (2006):
uglify
v 1: make ugly [ant: beautify, embellish, fancify,
prettify]