The word(s) "dreadful" appears 5 time(s) in 5 verse(s) in Quran in Mohsin Khan translation.

(1) (And remember) when you ran away (dreadfully) without even casting a side glance at anyone, and the Messenger (Muhammad صلى الله عليه وسلم) was in your rear calling you back. There did Allah give you one distress after another by way of requital to teach you not to grieve for that which had escaped you, nor for that which had befallen you. And Allah is Well-Aware of all that you do.

(2) And (also) those who spend of their substance to be seen of men, and believe not in Allah and the Last Day [they are the friends of Shaitan (Satan)], and whoever takes Shaitan (Satan) as an intimate; then what a dreadful intimate he has!

(3) So they both proceeded, till, when they embarked the ship, he (Khidr) scuttled it. Musa (Moses) said: "Have you scuttled it in order to drown its people? Verily, you have committed a thing "Imr" (a Munkar - evil, bad, dreadful thing)."

(4) Then they both proceeded, till they met a boy, and he (Khidr) killed him. Musa (Moses) said: "Have you killed an innocent person who had killed none? Verily, you have committed a thing Nukr (a great Munkar - prohibited, evil, dreadful thing)!"

(5) On the Day when the heaven will shake with a dreadful shaking,