ثُمَّ مَآ أَدْرَىٰكَ مَا يَوْمُ ٱلدِّينِ
Sentence structure
ثُمَّ repeats the warning with added emphasis. Its two interrogative clauses have the same construction as the preceding ayah.
Ayah summary
The warning is repeated: the reality of that day cannot be fully grasped.
ثُمَّ — Then
Grammar: A conjunction indicating sequence with delay and adding emphasis here.
مَآ — what
Grammar: An interrogative pronoun functioning as the topic.
أَدْرَىٰكَ — can make you know
Grammar: A Form IV perfect verb with an understood subject; attached كَ is the first object and the following interrogative clause supplies the second.
مَا — what
Grammar: An interrogative pronoun functioning as the topic of the inner nominal clause.
يَوْمُ — (is the) Day
Grammar: A nominative noun functioning as the predicate of interrogative مَا and annexed to ٱلدِّينِ.
ٱلدِّينِ — (of) the Judgment
Grammar: A definite genitive noun functioning as the genitive complement of يَوْمُ.