وَأَكِيدُ كَيْدًۭا
Sentence structure
وَ coordinates. أَكِيدُ is a first-person singular indicative imperfect with understood subject أَنَا. كَيْدًۭا is its cognate accusative.
Ayah summary
Allah plans to bring their schemes to failure.
وَأَكِيدُ — But I am planning
Grammar: وَ coordinates; أَكِيدُ is a first-person singular indicative imperfect with understood subject أَنَا.
كَيْدًۭا — a plan
Grammar: An indefinite accusative verbal noun functioning as the cognate accusative of أَكِيدُ.