س د یs-d-y
(ن) سَدَا يَسْدُوْ سَدْوًاsadā yasdū sadwan: to leave a thing to itself; to let it roam unbridled.
سُدًيsudany (noun ending in alif maqṣūrah, ism maqṣūr): useless; left without any purpose; unbridled; the word occurs in the argument for the resurrection, i.e. does man suppose that he will be left thus, without purpose. ﴿اَيَحْسَبُ الْاِنْسَانُ اَنْ يُّتْرَكَ سُدًي﴾ (Al-Qiyāmah 75:36)Only once in the Quran.