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