The most common Korean word for “rest” is 쉬다 (swida). There is one more word with a similar meaning — compare them below. 「rest」는 한국어로 쉬다.
rest; take a break
TOPIK 1 · verb
rest; remainder
TOPIK 2 · noun
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato