a secret reason behind a plan or action

숨은 의도, 숨겨진 목적
said to ask someone to keep a conversation secret

우리끼리만, 아무에게도 말하지 마
to tell other people what is supposed to stay secret

입을 놀리다, 비밀을 누설하다
used to refer to an agreement made in order to keep someone from sharing or revealing information that should be otherwise publicly known

침묵의 공모, 침묵의 합의
to not let something become revealed to others

덮어두다, 숨겨 두다
to refrain from revealing one's true intentions or plans

속내를 드러내지 않다, 계획을 숨기다
to avoid sharing a secret with others

비밀로 해 두다, 아무에게도 말하지 않다
to decide to remain silent about something, particularly out of fear of making a situation worse

입을 다물다, 아무 말 하지 않다
said as a promise or request to not tell something to anyone else

아무에게도 말하지 마, 우리끼리만 알고 있자
used when one says that one will not reveal secret information

아무에게도 말 안 할게, 비밀은 꼭 지킬게
something about a person's past that they do not want to reveal or mention because it is embarrassing or unpleasant

숨기고 싶은 과거의 비밀, 감추고 싶은 흑역사
used to refer to a room, in which a group of people knows or witnesses something that others do not

우리끼리만, 이 방 밖으로 나가지 않게
to share information that is secret or private

비밀 얘기를 밖에 흘리다, 해서는 안 될 말을 퍼뜨리다
to keep one's thoughts or plans to oneself and not share them with others

속내를 드러내지 않다, 계획을 말하지 않다
to not let other people know about something

숨겨 두다, 아무도 모르게 하다
a person who can be trusted with one's secrets

입이 무거운 사람, 비밀을 잘 지키는 사람
to conceal or destroy evidence of one's activities or whereabouts to avoid detection or punishment

흔적을 지우다, 증거를 없애다
to try to conceal flaws or problems temporarily, without addressing or solving them properly

문제를 겉으로만 덮다, 임시방편으로 가리다
to keep something secret or confidential and not to reveal it to others

비밀로 해 두다, 아직 공개하지 않다
a piece of personal or private information that one refuses to share with anyone

개인적인 비밀, 나만의 비밀
