ثُبُورٌ
Perdition: (Katádeh, T, S, M, K:) loss; a going astray; or becoming lost: (S:) woe: (Katádeh, T, M, K:) destruction (M, A, K) from which there is no rising again. (M, A.) Hence it is said that the people of Hell will call out, وَاثُبُورَاهْ
Alas for destruction from which there is no rising again! (M, A.) In the Qur'an, 25:14 and 15, ثُبُورًا is in the accusative case as a verbal noun, as though they said, ثَبَرْنَا ثُبُورًا; and, being a verbal noun, it is used as a singular and plural (Fr, Zj, T.)