فَيُعَذِّبُهُ ٱللَّهُ ٱلْعَذَابَ ٱلْأَكْبَرَ
Sentence structure
فَيُعَذِّبُهُ is the verb with attached هُ as object. ٱللَّهُ is the subject; ٱلْعَذَابَ is a cognate accusative and ٱلْأَكْبَرَ its adjective.
Ayah summary
Allah will subject him to the greatest punishment.
فَيُعَذِّبُهُ — Then will punish him
Grammar: فَ resumes, يُعَذِّبُ is a third-person masculine-singular Form II indicative imperfect, and attached هُ its object.
ٱللَّهُ — Allah
Grammar: A nominative proper noun serving as the subject of يُعَذِّبُ.
ٱلْعَذَابَ — (with) the punishment
Grammar: ٱل is the definite article; عَذَابَ is an accusative cognate object emphasizing يُعَذِّبُ.
ٱلْأَكْبَرَ — greatest
Grammar: ٱل is the definite article; أَكْبَرَ is a masculine-singular accusative adjective of ٱلْعَذَابَ.