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