Rule
When followed by a sun letter, the l of the Arabic definite article al- assimilates to the initial consonant of the following noun, resulting in a doubled consonant. For example, for "the Nile", one does not say al-Nīl, but an-Nīl. When the definite article is followed by a moon letter, no assimilation takes place.
Sun letters represent all coronal consonants except ج ǧīm (see below). Since the article al- ends in a coronal consonant, it lends itself to assimilation with these sounds.
The sun and moon letters are as follows:
| Sun letters | ﺕ | ﺙ | ﺩ | ﺫ | ﺭ | ﺯ | ﺱ | ﺵ | ﺹ | ﺽ | ﻁ | ﻅ | ﻝ | ﻥ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| t | ṯ | d | ḏ | r | z | s | š | ṣ | ḍ | ṭ | ẓ | l | n | |
| Moon letters | ء | ﺏ | ﺝ | ﺡ | ﺥ | ﻉ | ﻍ | ﻑ | ﻕ | ﻙ | ﻡ | ﻭ | ﻱ | ه |
| ʾ | b | ǧ | ḥ | ḫ | ʿ | ġ | f | q | k | m | w | y | h |
Read more about this topic: Sun And Moon Letters
Famous quotes containing the word rule:
“While Michael Angelo’s Sistine roof,
His “Morning” and his “Night” disclose
How sinew that has been pulled tight,
Or it may be loosened in repose,
Can rule by supernatural right
Yet be but sinew.”
—William Butler Yeats (1865–1939)
“Your favor containing the question, as to whether I consider myself a “new woman” is before me. As a rule I do not consider myself at all. I am, and always have been a progressive woman, and while never directly attacking the conventionalities of society, have always done, or attempted to do those things which I have considered conducive to my health, convenience or emolument ...”
—Belva Lockwood (1830–1917)
“A right rule for a club would be, Admit no man whose presence excludes any one topic. It requires people who are not surprised and shocked, who do and let do, and let be, who sink trifles, and know solid values, and who take a great deal for granted.”
—Ralph Waldo Emerson (1803–1882)