غثو
 
Appears 2 times in the Quran.
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23:41 فَأَخَذَتْهُمُ ٱلصَّيْحَةُ بِٱلْحَقِّ فَجَعَلْنَٰهُمْ غُثَآءً فَبُعْدًا لِّلْقَوْمِ ٱلظَّٰلِمِينَSo the punishment overtook them in justice, and We made them as rubbish; so away with the unjust people. 
 
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Then makes it dried up, dust-colored.