وَٱلنَّهَارِ إِذَا جَلَّىٰهَا
Sentence structure
وَٱلنَّهَارِ is a coordinated genitive oath noun. إِذَا جَلَّىٰهَا is its temporal clause: جَلَّىٰ is Form II, its subject is understood هُوَ, and هَا is the object.
Ayah summary
And by the day as it reveals the sun in full brightness.
وَٱلنَّهَارِ — And the day
Grammar: وَ coordinates, ٱل defines, and نَّهَارِ is a masculine genitive oath noun. An omitted circumstantial element is associated with «ٱلنَّهَارِ».
إِذَا — when
Grammar: A non-governing temporal adverb introducing the following time clause. This phrase is linked through an omitted element.
جَلَّىٰهَا — it displays it
Grammar: A Form II third-person masculine-singular perfect with understood subject هُوَ and attached object هَا.