ugliness - adj.
(uglier, ugliest)
1 unpleasing or repulsive to see or hear (an ugly scar; spoke with an ugly snarl)).
2 unpleasantly suggestive; discreditable (ugly rumours are about).
3 threatening, dangerous (the sky has an ugly look).
4 morally repulsive; vile (ugly vices).

ugly customer an unpleasantly formidable person. ugly duckling a person who turns out to be beautiful or talented etc. against all expectations (with ref. to a cygnet in a brood of ducks in a tale by Andersen).

uglily adv. ugliness n. [ME f. ON uggligr to be dreaded f. ugga to dread]