The most common Korean word for “cool” is 시원하다 (siwonhada). There are 3 more words with a similar meaning — compare them below. 「cool」는 한국어로 시원하다.
to be cool; to be refreshing
TOPIK 1 · adjective
cool; refreshing
TOPIK 2 · adjective
cool; stylish; impressive
TOPIK 1 · adjective
cool; cool down; get cold
TOPIK 2 · verb
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato