Ghayn غ

Ghayn is the nineteenth letter of the modern Arabic order. It is the ayn skeleton with a single dot placed above it, and like ayn it joins on both sides and takes four markedly different shapes according to position. It is a moon letter, so the lam of the definite article is pronounced before it.

Its sound is a voiced velar fricative, a rasping g made without full closure, close to the r of Parisian French and to the g of some Dutch. It is the voiced counterpart of kha, and both belong to the group of throat letters, at the end of that group nearest the mouth.

Ghayn is the last of the six letters Arabic added to the alphabet it inherited, and that fact fixes its numeral value. The abjad reckoning assigns values by position in the inherited twenty-two letter sequence, from one to four hundred; the six additions were appended after it and took the six remaining values, five hundred to one thousand, in the order in which they were appended. Ghayn came last and therefore carries one thousand, the highest value in the system.

That has consequences beyond arithmetic. Because the largest number in the abjad belongs to a letter with no ancient pedigree, chronograms and letter calculations weight most heavily a letter the older Semitic alphabets never had. As one of the added letters, ghayn has no inherited name and no reconstructed pictographic sense.

Alongside grammar and calligraphy, the Islamic world developed a body of speculation on the letters themselves, known as ilm al-huruf, the science of letters. It treats the letters as more than notation: as elements with numerical values, with assignments to the elements, the planets and the divine names, and with a place in accounts of how creation is ordered. Ibn Arabi, in the thirteenth century, gives the letters a substantial role in his metaphysics. Ahmad al-Buni, whose works circulated widely under his name and were much added to after his death, is the figure most associated with the practical and talismanic end of the same material.

The tradition is real, continuous and internally varied. It runs from speculative theology through Sufi cosmology to the making of squares, amulets and inscriptions, and its practitioners have included figures held in high regard and figures regarded with suspicion by their contemporaries. Jurists have objected to parts of it; other scholars have defended parts of it; the argument is old and is not settled.

The atlas records that this body of material exists, that it assigns letters numerical values through the abjad reckoning, and that it has a documented history and a documented range of positions taken about it. It does not set out the correspondences as a working system, does not supply instructions, and does not present the operative material as an available technique. Describing a tradition and teaching it are different acts, and the second is not what a reference work is for. Where a specific correspondence is genuinely attested in a named work, it can be recorded as that work's claim; where it is a modern reconstruction offered without attribution, it is not recorded at all.