Word by Word Analysis

وَمَنْ أَضَلُّ مِمَّن يَدْعُوا۟ مِن دُونِ ٱللَّهِ مَن لَّا يَسْتَجِيبُ لَهُۥٓ إِلَىٰ يَوْمِ ٱلْقِيَـٰمَةِ وَهُمْ عَن دُعَآئِهِمْ غَـٰفِلُونَ 5

And who is more astray than he who invokes besides Allāh those who will not respond to him until the Day of Resurrection [i.e., never], and they, of their invocation, are unaware.