Yap.Town

보이지 않는

invisible

→ 보이다
phrase Common #3,245
invisible Literally means “not seen” and is used before a noun to describe something that cannot be seen. The related form 보이지 않게 means “invisibly” or “so that it cannot be seen.”
KO: 보이지 않는 곳에 숨겨 두었어요.
EN: I hid it in a place where it can't be seen.

별로 어려워 보이지 않는 일 입니다.

It doesn't seem like a particularly difficult task.