The word(s) "conceal" appears 34 time(s) in 32 verse(s) in Quran in Muhammad Habib Shakir translation.

(21) And Allah knows what you conceal and what you do openly.

(22) Do not hold the Apostle's calling (you) among you to be like your calling one to the other; Allah indeed knows those who steal away from among you, concealing themselves; therefore let those beware who go against his order lest a trial afflict them or there befall them a painful chastisement.

(23) And most surely your Lord knows what their breasts conceal and what they manifest.

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

(25) And your Lord knows what their breasts conceal and what they manifest.

(26) 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.

(27) And those who were deemed weak shall say to those who were proud. Nay, (it was) planning by night and day when you told us to disbelieve in Allah and to set up likes with Him. And they shall conceal regret when they shall see the punishment; and We will put shackles on the necks of those who disbelieved; they shall not be requited but what they did.

(28) He knows the stealthy looks and that which the breasts conceal.

(29) Or do they think that We do not hear what they conceal and their secret discourses? Aye! and Our apostles with them write down.

(30) O you who believe! do not take My enemy and your enemy for friends: would you offer them love while they deny what has come to you of the truth, driving out the Apostle and yourselves because you believe in Allah, your Lord? If you go forth struggling hard in My path and seeking My pleasure, would you manifest love to them? And I know what you conceal and what you manifest; and whoever of you does this, he indeed has gone astray from the straight path.