had no idea
definitions
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to be completely unaware of somethingko: 완전히 모른다
examples
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I had no idea you were coming until you knocked on the door.
문을 두드리는 때까지 너를 올 것이라고 전혀 몰랐다.
I had no idea you were coming until you knocked on the door.
문을 두드리는 때까지 너를 올 것이라고 전혀 몰랐다.