Word Example from TV Shows
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.

Let her go. And under no CIRCUMSTANCE
will you give her that engagement ring.
The Big Bang Theory Season 9, Episode 14

Yeah, this is a special CIRCUMSTANCE.
The Big Bang Theory Season 10, Episode 18

It's all pomp and CIRCUMSTANCE
until someone loses an eye.
The Big Bang Theory Season 8, Episode 22

Yeah, well, a CIRCUMSTANCE can happen
twice and still be special.
The Big Bang Theory Season 10, Episode 18

"an aggravating CIRCUMSTANCE