Word by Word Analysis

وَعَجِبُوٓا۟ أَن جَآءَهُم مُّنذِرٌ مِّنْهُمْ ۖ وَقَالَ ٱلْكَـٰفِرُونَ هَـٰذَا سَـٰحِرٌ كَذَّابٌ 4

And they wonder that there has come to them a warner [i.e., Prophet Muḥammad (ﷺ)] from among themselves. And the disbelievers say, "This is a magician and a liar.