For them therein is heavy sighing, and they therein will not hear. (21:100)

Almuntakhab Fi Tafsir Alquran Alkarim

There within, shall they pant, emitting with difficulty a deep breath and drawing with more difficulty a long breath heaving sighs and giving sobs, and the painful emotion compounded of loathing and fear and the feeling excited by fright shall deafen their ears that they cannot hear

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(21:100)There they will groan, *96 but they shall hear nothing (in response due to the roaring noise).

For them therein is heavy sighing, and they therein will not hear. meaning

*96) The Arabic word ~i j (zafir) means `hard breathing' because of excessive heat, hard work and weariness.
 

For them therein is heavy sighing, and they therein will not hear. meaning in Urdu

وہاں وہ پھنکارے ماریں گے اور حال یہ ہو گا کہ اس میں کان پڑی آواز نہ سنائی دے گی