وَجَعَلۡنَا عَلَىٰ قُلُوبِهِمۡ أَكِنَّةً أَن يَفۡقَهُوهُ وَفِيٓ ءَاذَانِهِمۡ وَقۡرٗاۚ وَإِذَا ذَكَرۡتَ رَبَّكَ فِي ٱلۡقُرۡءَانِ وَحۡدَهُۥ وَلَّوۡاْ عَلَىٰٓ أَدۡبَٰرِهِمۡ نُفُورٗا ٤٦
And We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And when you mention your Lord alone in the Qur’ān, they turn back in aversion.
Translation: Saheeh International (English)
Each word's meaning and sound
I have put covers on their hearts so that they cannot understand the Qur’ān, and heaviness in their ears so that they cannot listen to it in a beneficial manner. When you mention your Lord in the Qur’ān alone, and you do not mention their so-called gods, they turn on their heels being far away from accepting Allah’s pure Oneness.
Al-Mukhtasar in interpreting the Noble Quran