al-Khasais
- Author died
- 392 AH
- Editions
- General Egyptian Book Organization (al-Hay'ah al-Miṣrīyah al-‘Āmmah lil-Kitāb)
al-Khasais (The Properties) is a major Arabic philological treatise on the philosophy of language, grammatical theory (usul al-nahw), and morphology by the grammarian Ibn Jinni (d. 392 AH / 1002 CE) .
Composition and Purpose
Ibn Jinni composed the book following the death of his teacher Abu Ali al-Farisi (d. 377 AH) and dedicated it to the Buyid dynasty ruler Baha al-Dawla (reigned 379–403 AH) . In his introduction, Ibn Jinni noted that he had long contemplated writing a comprehensive work demonstrating the underlying wisdom, structural precision, and causes (‘ilal) of Arabic . He framed the book as an unprecedented endeavor, observing that earlier grammarians of Basra and Kufa had not codified the theoretical foundations of grammar (usul al-nahw) in the manner that scholars of jurisprudence and theology structured legal theory (usul al-fiqh) and speculative theology (usul al-kalam) .
Structure and Core Themes
The work explores foundational linguistics, dialectology, grammatical reasoning, and semantic theory across numerous specialized chapters:
- Origin and Nature of Language: Ibn Jinni examines whether human language originated through divine revelation (tawqif / ilham) or social convention (istilah / tawadu‘), weighing rational arguments alongside scriptural interpretations . He also considers the onomatopoeic theory that words originally developed from the imitation of natural sounds—such as the blowing of wind, the rumble of thunder, or animal calls .
- Methodology of Grammatical Evidence: The book establishes rules for the core proofs of grammar, examining transmitted speech (sama‘), analogical reasoning (qiyas), and scholarly consensus (ijma‘) . It investigates tensions between regular patterns (ittirad) and anomalies (shudhudh), the reconciliation of conflicting transmissions with analogy, and whether coined forms that conform to analogy are considered part of Arabic .
- Grammatical Causes (‘Ilal): Ibn Jinni devotes extensive discussion to defending grammatical causation against critics who dismissed it as weak, distinguishing linguistic causes from legal and theological ones and arguing that grammatical causes rely on innate linguistic intuition (badihat al-tab‘) .
- Dialects and Transmission: He addresses tribal dialectal variation, arguing in a dedicated chapter that disparate Bedouin dialects are valid proofs (hujja) when consistent with analogy, while detailing criteria for accepting usage from authentic nomadic Arabs rather than sedentary populations .
- Etymology and Phonosemantics: The text discusses broader lexical principles, such as "greater derivation" (al-ishtiqaq al-akbar) and the correlation between phonetic proximity and semantic affinity (tasaqub al-alfaz li-tasaqub al-ma‘ani) .
Reception and Editions
al-Khasais is widely treated as a foundational milestone in Arabic philology and the philosophy of language . Later scholars evaluated its structural scope; Jalal al-Din al-Suyuti observed that although Ibn Jinni intended it as a work on usul al-nahw, much of its content ranged beyond strict grammatical theory to encompass broader linguistic topics, digressions, and varied material .
The text has been published in three volumes, with a notable critical edition prepared by Muhammad Ali al-Najjar .
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