How to know which Korean word is more formal

We answer a lot of questions every day on Twitter! ( http://twitter.com/ttmik ) Quite often, we get questions about two Korean words that are similar in meaning and our answer is often that one is more formal than the other. Here's how to find out which one sounds more formal! Naver dictionary: https://endic.naver.com/?sLn=en For more Korean study materials:http://bit.ly/store-podcast