The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

...as a HIDEOUS disfigured freak.
The Big Bang Theory Season 8, Episode 9

It is HIDEOUS.
The Big Bang Theory Season 7, Episode 16

"face-to-face with a HIDEOUS,
foul-smelling,
The Big Bang Theory Season 5, Episode 4

Or I can make sure you die
in the most HIDEOUS way imaginable.
Game of Thrones Season 5, Episode 8

No, still HIDEOUS.
The Big Bang Theory Season 10, Episode 10