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