"Ilm us Sarf" is a foundational Islamic book focused on the science of Arabic morphology (Sarf), which studies the patterns and structures of Arabic words, especially verb forms and their derivations.

The book explains how roots change to form different meanings and grammatical functions, helping students understand how words are constructed and how their meanings evolve. It is essential for anyone learning classical Arabic, particularly those studying the Qur’an and Hadith, as it deepens comprehension of the language’s rich and precise system.