older sister (if you are a younger male)
누나
uncle
삼촌
older brother (if you are a younger male)
형
grandpa
할아버지
Dad
아빠
Younger sibling
동생
Mom
엄마
grandma
할머니
older sister (if you are a younger female)
언니
older brother (if you are a younger female)
오빠
Aunt
이모