In this post, another method for identifying Root for an Arabic Word is discussed.
This method can be used for identifying Roots used in the Qur'an, but since this website is not complete, some of the data may be inaccurate or incomplete.
1. In your browser type the following:
http://www.openburhan.net/ob.php?sid=3&vid=170
Note: The yellow highlighted locations in the link above, in the 1st you type the Surah number, and in the 2nd you type the Ayat number.i.e. sid=&vid= , sid=3&vid=170
2. Suppose you want to know the root of the Word يَسْتَبْشِرُونَ used in 3:170. You type in your browser the above link.
Now click the word يَسْتَبْشِرُونَ
3. On clicking يَسْتَبْشِرُونَ , you should get below result.