This is the 2676th most frequent Korean word.
숨기지
"To hide" or "hiding."
Here, '숨기지' is used as 'not hiding' in a negative declarative form to indicate a promise or intention not to conceal something.
그가 중요한 사실을 숨기지 않겠다고 했어요.
He said he would not hide an important fact.
In this sentence, '숨기지' is part of the imperative form '숨기지 말고', urging someone to refrain from concealing something.
무엇을 숨기지 말고 솔직히 말해 주세요.
Please do not hide anything and speak frankly.
Here, '숨기지' appears in the context of 'Unable to conceal', combined with '못했어요' to denote a lack of ability to hide something.