لِكُلِّ ٱمْرِئٍ مِّنْهُمْ يَوْمَئِذٍ شَأْنٌ يُغْنِيهِ
Sentence structure
The fronted phrase لِكُلِّ ٱمْرِئٍ is the predicate and شَأْنٌ the delayed subject. يُغْنِيهِ is an adjectival clause describing that matter; يَوْمَئِذٍ is a time adverb for whose attachment more than one recognized parsing exists.
Ayah summary
On that Day, every person will be occupied by a concern that leaves no attention for anyone else.
لِكُلِّ — For every
Grammar: لِ is a preposition. genitive noun functioning as the genitive complement.
ٱمْرِئٍۢ — man
Grammar: genitive noun functioning as the genitive complement.
مِّنْهُمْ — among them
Grammar: مِّنْ is a preposition and attached هُمْ its genitive pronoun. The phrase relates to an omitted adjective of ٱمْرِئٍ.
يَوْمَئِذٍۢ — that Day
Grammar: يَوْمَئِذٍ is a time adverb functioning as the linked complement.
شَأْنٌۭ — (will be) a matter
Grammar: An indefinite masculine nominative noun functioning as the delayed subject.
يُغْنِيهِ — occupying him
Grammar: form IV third-person masculine singular imperfect verb; it functions as the adjective. Attached هِ is a third-person masculine singular pronoun functioning as the object.