سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
Implying, according to all the classical commentators, "there has indeed been an immensely long [or "endless"] span of time" - the interrogative particle hal having here the positive meaning of qad. However, this meaning can be brought out equally well by interpolating the word "not".
Lit., "a thing mentioned" or "mentionable" - i.e., non-existent even as a hypothetical concept. The purport of this statement is a refutation of the blasphemous "anthropocentric" world-view, which postulates man as he exists - and not any Supreme Being - as the centre and ultimate reality of all life.
This is the time before a human comes into being and as an embryo.
The undoubted fact is mentioned in the form of a question, to get the assent of man. It is certain that the physical world existed long before man was ever heard of or mentioned, as geological records prove. It is also true that the world existed long before man came on the scene: see ii. 30-31. Man is here taken in a generic sense.
Dahr is Time as a whole, or for a long period.