The most common Korean word for “last year” is 작년 (jangnyeon). There is one more word with a similar meaning — compare them below. 「last year」는 한국어로 작년.
Learn 작년 free — flashcards, audio and review →「작년」 단어장으로 무료로 외우기Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato