Asalaam
alaikum waRahmatulah waBarakatuh
وَإِنَّالَجَاعِلُونَمَاعَلَيْهَاصَعِيدًاجُرُزًا
wa
innaa la jaa'iloona maa 'alayhaa Sa'eedan
Juruza
And surely
We, surely [will] make what [is] upon
it (the
Earth) Dust, [and] Lifeless. [al Kahf 18:8]
Sa'eed
- Dust.
[similar
word; Sa'ood - an Elevated height - (see: Muddathir
74:17)]
is
also mentioned in the Qur'an.
So
right now you see Mountains and Heights of buildings etc. (Sa'ood)
However, one day they will all collapse apart and all you will see
above you and around you is Dust (sa'eed).
Juruza
- Lifeless / dead.
From
the word Jarz
- to kill off a land so no vegetation grows on it.
I.e.When a land has plants
and trees and life, when all that is destroyed and the land is
barren/dead = Juruza.
So
Allah is telling us through these 2 words that all
that is Above you and Below you will become lifeless, dead and only
dust / nothingness.
Allah
has shown His creative power over the Earth and how He has placed so
much life, height and beauty in it. Yet He will cause it all to
become lifeless and nothingness.
see
Linguistic tafseer of surah al Kahf
here;
http://linguisticmiracle.com/kahf_grammar_uncomplete.html