س د دs-d-d
(ن) سَدَّ يَسُدُّ سَدًّاsadda yasuddu saddan: to stop up a breach; to set right; to erect a wall.
سَدٌّsadd (noun, ism dhāt): a wall; a barrier. ﴿وَجَعَلْنَا مِنْۢ بَيْنِ اَيْدِيْهِمْ سَدًّا﴾ (Yā Sīn 36:9)
سَدِيْدٌsadīd (adjective on the pattern of فَعِيْلٌfaʿīl): right, straight and sound (speech). ﴿وَقُوْلُوْا قَوْلًا سَدِيْدًا﴾ (Al-Aḥzāb 33:70)
Form VII (infiʿāl) اِنْسَدَّ يَنْسَدُّ اِنْسِدَادًاinsadda yansaddu insidādan: to be closed; to be blocked (this verb is not used in the Quran).