Word by Word Analysis

بِئْسَمَا ٱشْتَرَوْا۟ بِهِۦٓ أَنفُسَهُمْ أَن يَكْفُرُوا۟ بِمَآ أَنزَلَ ٱللَّهُ بَغْيًا أَن يُنَزِّلَ ٱللَّهُ مِن فَضْلِهِۦ عَلَىٰ مَن يَشَآءُ مِنْ عِبَادِهِۦ ۖ فَبَآءُو بِغَضَبٍ عَلَىٰ غَضَبٍ ۚ وَلِلْكَـٰفِرِينَ عَذَابٌ مُّهِينٌ 90

How wretched is that for which they sold themselves - that they would disbelieve in what Allāh has revealed through [their] outrage that Allāh would send down His favor upon whom He wills from among His servants. So they returned having [earned] wrath upon wrath. And for the disbelievers is a humiliating punishment.