What is the meaning of "raib az-zaman"?

Perhaps the questioner is referring to the Almighty's saying: (Or do they say: "A poet, for whom we await the vicissitudes of fate"?) (Qur’an 52:30). "Al-Manun" is one of the names of ad-dahr (time). "Rayb al-Manun" refers to the misfortunes of time, such as death or a destructive accident, and so on. "Rayb" here signifies misfortunes and calamities, because they cause anxiety to whoever experiences them.