al-Fayruzabadi

Majd ad-Din Abu Tahir Muhammad ibn Yaqub al-Fayruzabadi (729-817 AH / 1329-1415 CE) was one of the greatest Arabic lexicographers in history. Born in Karazin near Shiraz, he traveled extensively across the Muslim world, studying under scholars in Iraq, Syria, Egypt, the Hijaz, India, and Yemen, before eventually settling in Yemen, where he served as the Chief Justice of Yemen.

Al-Fayruzabadi's monumental work al-Qamus al-Muhit (The Encompassing Ocean) is one of the most comprehensive Arabic dictionaries ever compiled. Drawing on and improving upon earlier dictionaries, particularly Ibn Mansur's Lisan al-Arab (which he abridged and reorganized), he produced a lexical work that became the standard reference in Arabic lexicography. The title al-Qamus al-Muhit (meaning the encompassing ocean or ocean dictionary) became so associated with dictionaries in the Arabic tradition that the Arabic word qamus later became a generic word for dictionary.

He also authored Basa'ir dhawi at-Tamyiz fi Lata'if al-Kitab al-Aziz, a lexicological study of Quranic vocabulary, and al-Bulghah fi Tarjim A'immat an-Nahw wal-Lughah, a biographical work on grammarians and lexicographers. He wrote prolifically across many disciplines.

Al-Fayruzabadi's al-Qamus al-Muhit was later expanded and annotated by az-Zabidi in his monumental Taj al-Arus. Al-Fayruzabadi passed away in Zebid, Yemen, in 817 AH. His lexicographical legacy shaped Arabic scholarship for centuries and his name is immortalized in the Arabic language through the word qamus.