وَٱلْجِبَالَ أَرْسَىٰهَا
Ayah summary
Allah firmly established the mountains in their places.
Sentence structure
وَٱلْجِبَالَ is accusative through an omitted verb explained by أَرْسَىٰهَا; this is ishtighāl. The stated verb is perfect, its understood subject is He, and attached هَا is its object referring to the mountains collectively.
وَٱلْجِبَالَ — And the mountains
Grammar: وَ is a conjunction and ٱلْ is the definite article. ٱلْجِبَالَ is accusative through an omitted verb explained by أَرْسَىٰهَا; this is the construction of preoccupation (ishtighāl). The attached هَا is the expressed object of the stated verb.
أَرْسَىٰهَا — He made them firm
Grammar: أَرْسَىٰ is a third-person masculine singular perfect verb with understood subject هُوَ. Attached هَا is its object pronoun referring to the mountains collectively.