The word(s) "conceal" appears 43 time(s) in 43 verse(s) in Quran in Mohsin Khan translation.

(21) And He is Allah (to be worshipped Alone) in the heavens and on the earth; He knows what you conceal and what you reveal, and He knows what you earn (good or bad). (See V.43:84)

(22) Nay, it has become manifest to them what they had been concealing before. But if they were returned (to the world), they would certainly revert to that which they were forbidden. And indeed they are liars.

(23) They (the Jews, Quraish pagans, idolaters) did not estimate Allah with an estimation due to Him when they said: "Nothing did Allah send down to any human being (by revelation)." Say (O Muhammad صلى الله عليه وسلم): "Who then sent down the Book which Musa (Moses) brought, a light and a guidance to mankind which you (the Jews) have made into (separate) papersheets, disclosing (some of it) and concealing much. And you (believers in Allah and His Messenger Muhammad صلى الله عليه وسلم) were taught (through the Qur'an) that which neither you nor your fathers knew." Say: "Allah (sent it down)." Then leave them to play in their vain discussions. (Tafsir Al-Qurtubi).

(24) Should they find a refuge, or caves, or a place of concealment, they would turn straightway thereto with a swift rush.

(25) No doubt! They did fold up their breasts, that they may hide from Him. Surely, even when they cover themselves with their garments, He knows what they conceal and what they reveal. Verily, He is the All-Knower of the (innermost secrets) of the breasts.

(26) It is the same (to Him) whether any of you conceal his speech or declares it openly, whether he be hid by night or goes forth freely by day.

(27) "O our Lord! Certainly, You know what we conceal and what we reveal. Nothing on the earth or in the heaven is hidden from Allah.

(28) And Allah knows what you conceal and what you reveal.

(29) Certainly, Allah knows what they conceal and what they reveal. Truly, He likes not the proud.

(30) With their hearts occupied (with evil things). Those who do wrong, conceal their private counsels, (saying): "Is this (Muhammad صلى الله عليه وسلم) more than a human being like you? Will you submit to magic while you see it?"