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.

Pleasant surprise
in an UNPLEASANT situation.
Game of Thrones Season 7, Episode 7

...UNPLEASANT.
The Big Bang Theory Season 2, Episode 7

- Most likely.
- Unpleasant man.
Game of Thrones Season 5, Episode 2

You've carried
more UNPLEASANT cargo in your time.
Game of Thrones Season 2, Episode 4

as he is UNPLEASANT
towards those who don't.
Game of Thrones Season 3, Episode 5