ثُمَّ لَا يَمُوتُ فِيهَا وَلَا يَحْيَىٰ
Sentence structure
ثُمَّ coordinates with delay. لَا يَمُوتُ فِيهَا is a negative verbal clause; وَلَا يَحْيَىٰ is coordinated with it. Both imperfects are indicative and have understood subjects.
Ayah summary
There he will neither die nor enjoy a restful life.
ثُمَّ — Then
Grammar: A conjunction indicating sequence with delay.
لَا — not
Grammar: A non-governing negative particle negating the following indicative imperfect.
يَمُوتُ — he will die
Grammar: A third-person masculine-singular indicative imperfect with understood subject هُوَ.
فِيهَا — therein
Grammar: فِى is a preposition and attached هَا a third-person feminine-singular pronoun in the genitive; the phrase is linked to يَمُوتُ.
وَلَا — and not
Grammar: وَ coordinates and لَا negates the following indicative imperfect.
يَحْيَىٰ — will live
Grammar: A third-person masculine-singular indicative imperfect coordinated with يَمُوتُ, with understood subject هُوَ and an estimated ḍammah.