وَمَكَرُواwamakarūSo they plottedمَكْراًmakrana plotوَمَكَرْنَاwamakarnāand We plannedمَكْراًmakrana planوَهُمْwahumwhile theyلَاlā(did) notيَشْعُرُونَyashʿurūnaperceiveThey plotted a scheme and We plotted a scheme, while they did not notice.