وُجُوهٌۭ يَوْمَئِذٍۢ نَّاعِمَةٌۭ
Sentence structure
وُجُوهٌ is the nominative topic and نَّاعِمَةٌ its predicate. يَوْمَئِذٍ is the time expression linked to the predicate.
Ayah summary
On that day, many faces will be radiant.
وُجُوهٌۭ — Faces
Grammar: An indefinite broken-plural nominative topic. Across the ayah boundary, «وُجُوهٌ» carries into this ayah with an omitted predicate.
يَوْمَئِذٍۢ — that Day
Grammar: A time expression linked to the predicate. This phrase is linked to «وُجُوهٌ».
نَّاعِمَةٌۭ — (will be) joyful
Grammar: An indefinite feminine-singular nominative active participle serving as predicate.