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.

The darkness will DEVOUR them all, she
says. The night that never ends.
Game of Thrones Season 3, Episode 8

...they DEVOUR their mate.
The Big Bang Theory Season 6, Episode 1

Grey Worm can behead me,
or your dragons can DEVOUR me.
Game of Thrones Season 7, Episode 2

Not so long ago,
this city was ready to DEVOUR itself.
Game of Thrones Season 6, Episode 8

...and about to DEVOUR each other
when:
The Big Bang Theory Season 3, Episode 10