ض ی رḍ-y-r
(ض) ضَارَ يَضِيْرُ ضَيْرًاḍāra yaḍīru ḍayran (original form: ضَيَرَḍayara): to harm, to injure — synonymous with ḍ r r. Only once in the Quran, and that on the tongue of Pharaoh's sorcerers: ﴿قَالُوْا لَا ضَيْرَ إِنَّاۤ إِلٰى رَبِّنَا مُنْقَلِبُوْنَ﴾ (Ash-Shuʿarāʾ 26:50) — «لَا ضَيْرَlā ḍayra» i.e. no harm; lā of generic negation, with ضَيْرَḍayra as its noun (ism), indeclinable (mabnī) on fatḥah.