As a writer, it is important to have a diverse vocabulary to express different emotions and descriptions. When it comes to describing something or someone as 'ugly' in English, there are many words and phrases that can be used to convey this message.

One way to describe something as ugly is to use adjectives such as 'unattractive,' 'repulsive,' or 'hideous.' For example, 'The old, decrepit building was unattractive and repulsive to look at,' or 'The hideous monster in the movie was enough to make anyone cringe.'

Another way to express ugliness is through metaphors or similes. For example, you could say, 'Her face was like a potato that had been dropped and smashed,' or 'The room was as ugly as a toad.'

There are also many slang words and phrases that can be used to describe something or someone as ugly, although it is important to note that these words may not be appropriate in all situations. Some examples include 'butt ugly,' 'fugly,' or 'dog-ugly.'

In any case, when using English to describe something as ugly, it is important to consider the context and tone of your writing. While it is important to accurately convey your message, it is also important to avoid being overly harsh or offensive in your language.