The most common Korean word for “wash” is 씻다 (ssitda). There is one more word with a similar meaning — compare them below. 「wash」는 한국어로 씻다.
to wash; to clean
TOPIK 1 · verb
suck; puff on
TOPIK 2 · verb
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato