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.

whom you've convinced
to BOW down before her.
Game of Thrones Season 7, Episode 7

If I had a BOW, I could have shot a dozen.
Game of Thrones Season 3, Episode 6

You'd have our father
BOW down to your other family?
Game of Thrones Season 2, Episode 3

You think
you're good with that BOW, you little twat?
Game of Thrones Season 3, Episode 3

The fellow with the BOW is Anguy.
Game of Thrones Season 3, Episode 2