ض د دḍ-d-d
(ن) ضَدَّ يَضُدُّ ضَدًّاḍadda yaḍuddu ḍaddan: to prevail in a dispute.
ضِدٌّḍidd: opponent, adversary. ﴿وَيَكُوْنُوْنَ عَلَيْهِمْ ضِدًّا﴾ (Maryam 19:82)
Form VI (tafāʿul) تَضَادَّ يَتَضَادُّ تَضَادًّاtaḍādda yataḍāddu taḍāddan: (of two things) to be opposites of each other (this verb is not used in the Quran).