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