Hello - 안녕하세요 [annyeong-haseyo] 안녕하세요 [a-nyeong-ha-se-yo] is the formal, polite way to say hello in Korean and is the most important for you to know when you are just beginning learning Korean or if you are in need of some simple travel Korean. A fun fact about this word: it has the literal meaning of 'be in peace'.