Overview:

Arabic (اللغة العربية al-luġatu l-arabiyyah or just عربي arabī) is the largest living member of the Semitic language family in terms of speakers. Classified as Central Semitic, it is closely related to Hebrew and Aramaic. Modern Arabic is classified as a macrolanguage with 27 sub-languages in ISO 639-3. These varieties are spoken throughout the Arab world, and Standard Arabic is widely studied and known throughout the Islamic world.

Modern Standard Arabic derives from Classical Arabic, the only surviving member of the Old North Arabian dialect group, attested epigraphically since the 6th century, which has been a literary language and the liturgical language of Islam since the 7th century.

Arabic has lent many words to other languages of the Islamic world, akin to the role Latin has in most European languages. During the Middle Ages Arabic was also a major vehicle of culture, especially in science, mathematics and philosophy, with the result that many European languages have also borrowed numerous words from it.

Literary and Modern Standard Arabic:

The term "Arabic" may refer with equal accuracy to either literary Arabic (fuṣḥā) or the many localized varieties of Arabic commonly called "colloquial Arabic". Arabs consider literary Arabic as the standard language and tend to view everything else as mere dialects. Literary Arabic (اللغة العربية الفصحى translit: al-luġatu l-arabiyyatu l-fuṣḥā "the most eloquent Arabic language"), refers both to the language of present-day media across North Africa and the Middle East and to the language of the Qur'an. (The expression media here includes most television and radio, and practically all written matter, including all books, newspapers, magazines, documents of every kind, and reading primers for small children.) "Colloquial" or "dialectal" Arabic refers to the many national or regional varieties derived from Classical Arabic, spoken daily across North Africa and the Middle East, which constitute the everyday spoken language. These sometimes differ enough to be mutually incomprehensible. These dialects are not typically written, although a certain amount of literature (particularly plays and poetry) exists in many of them. They are often used to varying degrees in informal spoken media, such as soap operas and talk shows. Literary Arabic or classical Arabic is the official language of all Arab countries and is the only form of Arabic taught in schools at all stages.

The sociolinguistic situation of Arabic in modern times provides a prime example of the linguistic phenomenon of diglossia–the normal use of two separate varieties of the same language, usually in different social situations. In the case of Arabic, educated Arabs of any nationality can be assumed to speak both their local dialect and their school-taught literary Arabic (to an equal or lesser degree). This diglossic situation facilitates code switching in which a speaker switches back and forth unaware between the two varieties of the language, sometimes even within the same sentence. In instances in which highly educated Arabs of different nationalities engage in conversation only to find their dialects mutually unintelligible (e.g. a Moroccan speaking with a Lebanese), both should be able to code switch into Literary Arabic for the sake of communication.

Like other languages, literary Arabic continues to evolve, and one can distinguish between Classical Arabic (especially from the pre-Islamic to the Abbasid period, including Qur'anic Arabic) and Modern Standard Arabic as used today. Classical Arabic is considered normative; modern authors attempt (with varying degrees of success) to follow the syntactic and grammatical norms laid down by Classical grammarians (such as Sibawayh), and to use the vocabulary defined in Classical dictionaries (such as the Lisan al-Arab.) However, the exigencies of modernity have led to the adoption of numerous terms which would have been mysterious to a Classical author, whether taken from other languages (eg فيلم film) or coined from existing lexical resources (eg هاتف hātif "telephone" < "caller"). Structural influence from foreign languages or from the colloquials has also affected Modern Standard Arabic: for example, MSA texts sometimes use the format "A, B, C, and D" when listing things, whereas Classical Arabic prefers "A and B and C and D", and subject-initial sentences are significantly more common in MSA than in Classical Arabic. For these reasons, Modern Standard Arabic is generally treated separately in non-Arab sources.

Influence of Arabic on other languages:

The influence of Arabic has been most profound in those countries dominated by Islam or Islamic power. Arabic is a major source of vocabulary for languages as diverse as Berber, Kurdish, Persian, Swahili, Urdu, Hindi (especially the spoken variety), Bengali, Turkish, Malay, and Indonesian, as well as other languages in countries where these languages are spoken. For example the Arabic word for book /kita:b/ is used in all the languages listed, apart from Malay and Indonesian (where it specifically means "religious book").

In addition, Spanish and Portuguese both have large numbers of Arabic loan words.The terms borrowed range from religious terminology (like Berber taẓallit "prayer" < salat), academic terms (like Uyghur mentiq "logic"), economic items (like English "sugar") to placeholders (like Spanish fulano "so and so") and everyday conjunctions (like Urdu lekin "but".) Most Berber varieties (such as Kabyle), along with Swahili, borrow some numbers from Arabic. Most religious terms used by Muslims around the world are direct borrowings from Arabic, such as salat 'prayer' and imam 'prayer leader'. In languages not directly in contact with the Arab world, Arabic loanwords are often mediated by other languages rather than being transferred directly from Arabic; for example, most Arabic loanwords in Urdu entered through Persian, and many older Arabic loanwords in Hausa were borrowed from Kanuri.

In common with other European languages, many English words are derived from Arabic, often through other European languages, especially Spanish and Italian. Among them are commonly-used words like "sugar" (sukkar), "cotton" (quṭn) and "magazine" (maḫāzin).

English words more recognizably of Arabic origin include "algebra", "alcohol", "alchemy", "alkali" and "zenith." Some words in common use, such as "intention" and "information", were originally calques of Arabic philosophical terms.