The word(s) "certain" appears 184 time(s) in 178 verse(s) in Quran in Mohsin Khan translation.

(81) She said: "This is he (the young man) about whom you did blame me, and I did seek to seduce him, but he refused. And now if he refuses to obey my order, he shall certainly be cast into prison, and will be one of those who are disgraced."

(82) "O my sons! Go you and enquire about Yusuf (Joseph) and his brother, and never give up hope of Allah's Mercy. certainly no one despairs of Allah's Mercy, except the people who disbelieve."

(83) They said: "By Allah! Indeed Allah has preferred you above us, and we certainly have been sinners."

(84) They said: "By Allah! certainly, you are in your old error."

(85) And he raised his parents to the throne and they fell down before him prostrate. And he said: "O my father! This is the interpretation of my dream aforetime! My Lord has made it come true! He was indeed good to me, when He took me out of the prison, and brought you (all here) out of the bedouin-life, after Shaitan (Satan) had sown enmity between me and my brothers. certainly, my Lord is the Most Courteous and Kind unto whom He wills. Truly He! Only He is the All-Knowing, the All-Wise.

(86) Allah is He Who raised the heavens without any pillars that you can see. Then, He rose above (Istawa) the Throne (really in a manner that suits His Majesty). He has subjected the sun and the moon (to continue going round), each running (its course) for a term appointed. He manages and regulates all affairs; He explains the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) in detail, that you may believe with certainty in the meeting with your Lord.

(87) And if there had been a Qur'an with which mountains could be moved (from their places), or the earth could be cloven asunder, or the dead could be made to speak (it would not have been other than this Qur'an). But the decision of all things is certainly with Allah. Have not then those who believed yet known that had Allah willed, He could have guided all mankind? And a disaster will not cease to strike those who disbelieved because of their (evil) deeds or it (i.e. the disaster) settles close to their homes, until the Promise of Allah comes to pass. certainly, Allah breaks not His Promise.

(88) For them is a torment in the life of this world, and certainly, harder is the torment of the Hereafter. And they have no Waq (defender or protector) against Allah.

(89) "And why should we not put our trust in Allah while He indeed has guided us our ways? And we shall certainly bear with patience all the hurt you may cause us, and in Allah (Alone) let those who trust, put their trust."

(90) And they set up rivals to Allah, to mislead (men) from His Path! Say: "Enjoy (your brief life)! But certainly, your destination is the (Hell) Fire!"