Word by Word Analysis

أُو۟لَـٰٓئِكَ ٱلَّذِينَ خَسِرُوٓا۟ أَنفُسَهُمْ وَضَلَّ عَنْهُم مَّا كَانُوا۟ يَفْتَرُونَ 21

Those are the ones who will have lost themselves, and lost from them is what they used to invent.