유심히

carefully, closely, attentively

유심 care + 히 adverb-forming suffix (-ly)
adverb Rare #21,466
carefully, closely, attentively Used when watching or examining something with focused attention.
KO: 그림을 유심히 봤어요.
EN: I looked closely at the picture.

저 테이블을 유심히 봐 티는 내지 말고 웨이터!

Keep a close eye on that table, but don't make it obvious, waiter!

— 그레이트 뷰티 (2013)

있다니까 유심히 봐

I told you, it’s there—look closely.

— 날씨의 아이 (2019)