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.

...while lying
is characteristic of a VIOLENT sociopath.
The Big Bang Theory Season 1, Episode 10

In that case,
nobody would be with a VIOLENT man.
Money Heist Season 1, Episode 4

This would be so much easier
if I were a VIOLENT sociopath.
The Big Bang Theory Season 1, Episode 10

Oh, I do like a VIOLENT woman.
Game of Thrones Season 1, Episode 10

and if the movie gets
too VIOLENT, I cover her eyes.
The Big Bang Theory Season 11, Episode 11