Word by Word Analysis

إِنَّآ أَرْسَلْنَا عَلَيْهِمْ صَيْحَةً وَٰحِدَةً فَكَانُوا۟ كَهَشِيمِ ٱلْمُحْتَظِرِ 31

Indeed, We sent upon them one shriek [i.e., blast from the sky], and they became like the dry twig fragments of an [animal] pen.