秘密的，机密的　that other people are prevented from knowing about

　～ agent　特务，间谍
　～ alarm　暗自惊慌
　～ code　密码
　～ diplomacy　秘密外交
　～ document　秘密文件
　～ door　暗门
　～ enemy　隐藏的敌人
　～ harbour　偏僻的海港
　～ joint　暗榫接合
　～ marriage　秘密婚姻
　～ meeting　秘密会议
　～ negotiation　秘密谈判
　～ parts　阴部
　～ passage　暗道
　～ rejoicing　暗自高兴
　～ treaty　秘密条约
　～ valley　幽谷
　strictly ～　绝对机密的

　He was tortured by the secret police, but they could not break his spirit.　他遭到秘密警察的拷打，但他们并不能摧毁他的精神。
　They were forced to publish the secret news.　他们被迫公开秘闻。
　You can't fool me, I know about your secret plan!　你骗不了我，我知道你的秘密计划！
　He kept his money stored away in a secret place, lest his nephew should lay his hands on it.　他把钱藏在一个隐秘处，提防他侄儿拿到。
　That is my secret cottage in the country.　那是我在郊野的秘密住所。
　The kind medicine is based on a secret formula.　这种药是根据一种秘方制成的。
　He's a devious, secret person and I don't trust him.　他是一个狡猾诡秘的人，我不信任他。
　We discovered a secret passage behind the wall.　我们在墙后发现了秘密通道。
　John is a secret admirer of Helen, though he has never spoken to her.　约翰暗自爱慕海伦，尽管他从未对她说过。
　I'm a secret fan of soap operas on TV.　我从不声张我是电视剧迷。
　The plan is secret.　这计划是秘密的。
　These plans must be kept secret from enemy.　这些计划一定要对敌人保密。
　He is rather secret about his private affairs.　他对自己的私事有点守口如瓶。
　He kept his illness secret from his wife.　他不把自己的病告诉给他的妻子。

　请对我们结婚的事尽量保密。
　［误］ Please keep our marriage in secret as far as possible.
　［正］ Please keep our marriage secret as far as possible.
　［正］ Our marriage was kept in secret as far as possible.
　［析］ “对某事保守秘密”用keep sth secret的结构， secret在此是形容词，作宾语补足语。in secret（秘密地，暗地里）一般只能作状语，可以用sth to be done in secret的形式。

S 秘密，机密 sth kept hidden or known only to a few people

　break a ～　打破秘密
　disclose a ～　揭露秘密
　discover a ～　发现秘密
　explore a ～　探索秘密
　expose a ～　揭露秘密
　figure out the ～　发现〔找出〕奥秘
　give away a ～　泄露秘密
　guard a ～　保守秘密
　keep a ～　保守秘密
　know a ～　知晓秘密
　lay bare ～　揭露秘密
　let out the ～　泄露秘密
　offer a ～　提供秘密
　pass on the ～　传授秘诀
　possess this ～　掌握这一秘密
　pry a ～　探出秘密
　preserve a ～　保守秘密
　retain a ～　保守秘密
　reveal a ～　泄露秘密
　search out a ～　探出秘密
　sell a ～　出卖秘密
　spy out a ～　探出秘密
　steal a ～　窃取机密
　talk a ～　谈论秘密的事
　tell a ～　告诉秘密
　uncover a ～　公开一个秘密
　unlock a ～　揭露秘密
　yield a ～　泄露秘密
　dark ～　十分秘密
　dead ～　绝对秘密
　individual ～　个人秘密
　inside ～(s)　内部秘密
　open ～　公开的秘密
　technical ～　工业秘密
　top ～　绝密
　ugly ～　见不得人的内情
　valuable ～s　珍贵的机密
　vital ～　极重要的秘密
　well-kept ～　保守得十分严密的秘密
　atomic bomb ～　原子弹秘密
　state ～　国家机密
　trade ～　商业秘密
　in ～　秘密地，私下里
　meet in ～　秘密会见
　～ between you and me　只有你我知道的秘密
　～ for the cure of disease　治病的秘诀
　～ of correct book-keeping　正确记账的秘诀
　～ of health　养身秘诀
　～ of Nature　大自然的奥秘
　～ of success　成功秘诀
　～ of the universe　宇宙秘密

　She spilled the secret.　她泄露了机密。
　They told me not to reveal the secret.　他们要我不要泄露机密。
　He was on his honour not to tell the secret.　他以名誉担保不把这个秘密告诉别人。
　Guard the secret with your life, tell it to no one!　用生命保守住这秘密，别告诉任何人。
　I couldn't resist telling him the secret.　我忍不住要把秘密告诉他。
　His reputation had decided me to confide a secret to him.　他的声誉使我决定向他吐露一桩秘密。
　The wedding date is a big secret.　举行婚礼的日期是一大秘密。
　He made no secret of his dislike for me.　他并不讳言他不喜欢我。
　What's your secret for this wonderful pastry?　你做的酥馅饼真好，有什么诀窍?
　The secret to more effective writing is simple: talk to your reader.　把文章写得更有效果的诀窍很简单，那就是同读者谈话。
　The scientists are searching after the secret of life on earth.　科学家们正在探索地球上生命的奥秘。
　What's the secret of baking perfect bread?　烤出上好面包的秘诀是什么?

 ♣ in secret
　偷偷地，暗地里　without others knowing
　They met in secret to discuss the arrangements.　他们秘密会见，商议了各种安排。
　He had left the country in secret.　他已秘密出国。
　He married her in secret.　他秘密地娶了她。
 ♣ in the secret
　知道内情　among those who know the secret
　Is Phil in the secret?　菲尔是不是也知道其中的内情?
 ♣ let in on a secret
　让某人知道秘密　let sb know the secret
　They talked in a suppressed voice as he were letting her in on a secret.　他们谈话时声音压得很低，好像他在告诉她一个秘密似的。
　If I were you, I wouldn't let her in on the secret.　如果我是你的话，我不会叫她知道这个秘密。

 ♣ in secret, in the secret
　这两个短语在意思上和用法上都不同：前者作“秘密地”或“偷偷地”解，作状语，相当于secretly；后者则作“知道秘密”解，多用作表语。

　不要把这件事告诉别人。
　［误］ This is to be kept a secret to the others.
　［正］ This is to be kept a secret from the others.
　［析］ secret如用作名词，可用keep sth a secret from或keep a/the secret from的结构表示“对…保守秘密”。

　［派生词］ secretive adj.遮遮掩掩的，守口如瓶的，秘密的‖secretively adv.隐秘地
　［同义词］ adj. backdoor, close, deep, concealed, undercover, underhand, unpublished, unseen, covert, confidential, classified n. confidence, mystery, tips
　［反义词］ adj. open, public, overt
　［词源］　拉丁语secretus（隐藏起来的）