The most common Korean word for “or” is 또는 (ttoneun). 「or」는 한국어로 또는.
Learn 또는 free — flashcards, audio and review →「또는」 단어장으로 무료로 외우기Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato