Blame it to the korean drama hype in Malaysia, we are subconsciously learning korean language everytime we watch it. As of now, boys before flowers starring Goo Hye Sun is very famous in Korea.
I believe the most essential word that all of us should know would be:
This is a multi-usage word. A very useful indeed. It could mean good morning, good afternoon, good evening, good night, hello (when greeting someone) and bye bye.
The word like worm above? Ahh..that is korean character. It is so simple, it only took me a few hours to memorize it. It is soooooo easy.
Go here if you want to learn more.