The word(s) "concealed" appears 10 time(s) in 10 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And there is no blame on you respecting that which you speak indirectly in the asking of (such) women in marriage or keep (the proposal) concealed within your minds; Allah knows that you will mention them, but do not give them a promise in secret unless you speak in a lawful manner, and do not confirm the marriage tie until the writing is fulfilled, and know that Allah knows what is in your minds, therefore beware of Him, and know that Allah is Forgiving, Forbearing.

(2) O followers of the Book! indeed Our Apostle has come to you making clear to you much of what you concealed of the Book and passing over much; indeed, there has come to you light and a clear Book from Allah;

(3) And when they come to you, they say: We believe; and indeed they come in with unbelief and indeed they go forth with it; and Allah knows best what they concealed.

(4) Nay, what they concealed before shall become manifest to them; and if they were sent back, they would certainly go back to that which they are forbidden, and most surely they are liars.

(5) Say: Come I will recite what your Lord has forbidden to you-- (remember) that you do not associate anything with Him and show kindness to your parents, and do not slay your children for (fear of) poverty-- We provide for you and for them-- and do not draw nigh to indecencies, those of them which are apparent and those which are concealed, and do not kill the soul which Allah has forbidden except for the requirements of justice; this He has enjoined you with that you may understand.

(6) Say: My Lord has only prohibited indecencies, those of them that are apparent as well as those that are concealed, and sin and rebellion without justice, and that you associate with Allah that for which He has not sent down any authority, and that you say against Allah what you do not know.

(7) And you are not (engaged) in any affair, nor do you recite concerning it any portion of the Quran, nor do you do any work but We are witnesses over you when you enter into it, and there does not lie concealed from your Lord the weight of an atom in the earth or in the heaven, nor any thing less than that nor greater, but it is in a clear book.

(8) And there came travellers and they sent their water-drawer and he let down his bucket. He said: O good news! this is a youth; and they concealed him as an article of merchandise, and Allah knew what they did.

(9) And there is nothing concealed in the heaven and the earth but it is in a clear book.

(10) And when you said to him to whom Allah had shown favor and to whom you had shown a favor: Keep your wife to yourself and be careful of (your duty to) Allah; and you concealed in your soul what Allah would bring to light, and you feared men, and Allah had a greater right that you should fear Him. But when Zaid had accomplished his want of her, We gave her to you as a wife, so that there should be no difficulty for the believers in respect of the wives of their adopted sons, when they have accomplished their want of them; and Allah's command shall be performed.