قُلُوبٌ يَوْمَئِذٍ وَاجِفَةٌ
Ayah summary
On that day, many hearts will tremble with fear and anxiety.
Sentence structure
This is a nominal sentence. قُلُوبٌ is the subject, وَاجِفَةٌ describes it as trembling and serves as its adjective within the wider cross-ayah structure, while يَوْمَئِذٍ specifies the time.
قُلُوبٌۭ — hearts
Grammar: An indefinite feminine broken plural in the nominative, forming the subject of the description.
يَوْمَئِذٍۢ — that Day
Grammar: An adverb of time: يَوْمَ is مضاف and إِذٍ is in the genitive position as its annexed element.
وَاجِفَةٌ — trembling
Grammar: An indefinite feminine singular nominative active participle. It describes the non-human plural قُلُوبٌ and agrees with it as feminine singular.