This is the 18502nd most frequent Korean word.
시엔엔
"시엔엔" is the Korean transcription of "CNN," referring to the American news network.
In this sentence, '시엔엔' is used to refer to the specific news network, CNN, serving as a proper noun.
시엔엔은 미국의 뉴스 채널입니다.
CNN is an American news channel.
Here, '시엔엔' indicates the source of the news viewed, referring to the news channel being watched.
시엔엔에서 흥미로운 뉴스를 봤어요.
I watched an interesting news piece on CNN.
In this example, '시엔엔' specifies the content and provider of the news being checked regularly.