So a lot of people don’t know that there are two ways to say fire in Korean. The common way of saying “불” just refers to the flame or object of fire. So if you’re camping or cooking on the stove, 불 would be appropriate to call the flame you see burning.
However for 화재, it is used to convey the meaning of a disaster caused by a fire. You would see this term on the news a lot to refer to a building that has caught fire and probably has been destroyed.
불 can also be used to refer to electric lights/lamps.
불이 붙다 (bul-i but-da) means to catch fire.
불을 켜 주세요 (bul-eul kyeo ju-se-yo) means to turn on the light.
불을 꺼 주세요 (bul-eul kkeo ju-se-yo) means to turn off the light.Remember that romanization is only a tool! Try not to depend on it too much and try learning the Korean alphabet and how to pronounce the letters properly and you will have a much easier time learning.
Some great books to get your started are Korean Made Simple: A beginner's guide to learning the Korean language and Become a Hangeul Master: Learn to Read and Write Korean Characters
Check out our Dom & Hyo ebooks below.