Abjad

An abjad is a writing system in which only consonants are represented by letter signs, leaving the vowels to be inferred by the reader. This contrasts with alphabets that provide graphemes for both consonants and vowels. The term was introduced in 1990 by Peter T. Daniels. Other terms for the same concept include partial phonemic script, segmentally linear defective phonographic script, consonantary, consonant writing, and consonantal alphabet.
Impure abjads, such as the Arabic and Hebrew scripts, represent vowels with either optional diacritics or a limited number of distinct vowel graphemes, or both.

Etymology

The name abjad is based on the Arabic alphabet's first four letters in their original alphabetical ordercorresponding to ʾa, b, j, and dwhich reflects the alphabetical order ʾaleph, bet, gimel, dalet in other consonantal Semitic scripts such as Phoenician, Hebrew, and other Semitic proto-alphabets classified within the family of scripts used to write West Semitic languages.

Terminology

According to the formulations of Peter T. Daniels, abjads differ from alphabets in that only consonants, not vowels, are represented among the basic graphemes. Abjads differ from abugidas, another category defined by Daniels, in that in abjads, the vowel sound is implied by phonology, and where vowel marks exist for the system, such as niqqud for Hebrew and ḥarakāt for Arabic, their use is optional and not the dominant form. Abugidas mark all vowels with a diacritic, a minor attachment to the letter, a standalone grapheme, or by rotation of the letter. Some abugidas use a special symbol to suppress the inherent vowel so that the consonant alone can be properly represented. In a syllabary, a grapheme denotes a complete syllable, that is, either a lone vowel sound or a combination of a vowel sound with one or more consonant sounds.
The contrast of abjad versus alphabet has been rejected by other scholars because abjad is also used as a term for the Arabic numeral system. Also, it may be taken as suggesting that consonantal alphabets, in contrast to e.g. the Greek alphabet, were not yet true alphabets. Florian Coulmas, a critic of Daniels and of the abjad terminology, argues that this terminology can confuse alphabets with "transcription systems", and that there is no reason to relegate the Hebrew, Aramaic or Phoenician alphabets to second-class status as an "incomplete alphabet".
However, Daniels's terminology has found acceptance in the linguistic community.

Origins and history

The Proto-Sinaitic script represents the earliest-known trace of alphabetic writing. This script is generally considered to have been developed around the Sinai Peninsula during the Middle Bronze Age by speakers of an ancient West Semitic language who repurposed pictographic elements of local Egyptian hieroglyphs in order to construct a new script that represented the consonants of their own language using acrophony. The Proto-Sinaitic script is thought to represent, or at least indicate the existence of, an early ancestor of the many later Semitic consonantal scripts which continued to develop over time into more abstract, less visually representational forms, including the Phoenician abjad.
The Phoenician abjad was a radical simplification of phonetic writing. Unlike other scripts, such as Mesopotamian cuneiform and Egyptian hieroglyphs, the Phoenician abjad consisted of only a few dozen symbols. Presumably, the relative simplicity of the Phoenician abjad made this script easy to learn, allowed it to gain widespread usage, and influenced how readily it was adopted or adapted into the development of other scripts by non-Phoenicians who encountered seafaring Phoenician merchants and their script which they brought with them as they traded throughout the ancient Mediterranean world during the first millennium BCE.
During these exchanges, the Phoenician script gave rise to a number of new writing systems, including the widely used Aramaic abjad and the Greek alphabet. The Greek alphabet was later developed into several alphabets, including Etruscan, Coptic, Cyrillic, and Latin, while Aramaic became the ancestor of many abjads and abugidas of Asia, particularly in and around India, Southeast Asia, and Oceania.
Other sister scripts to Phoenician, that branched from Proto-Sinaitic script are the South Semitic scripts with its two main branches; the Ancient North Arabian scripts that were used in north and central Arabia, until it was displaced by the Arabic alphabet and Ancient South Arabian, which evolved later into the Geʽez script, still being used in Eritrea and Ethiopia.

Impure abjads

Impure abjads have characters for some vowels, optional vowel diacritics, or both. The term pure abjad refers to scripts entirely lacking in vowel indicators. However, most abjads, such as Arabic, Hebrew, Aramaic, and Pahlavi, are "impure" abjadsthat is, they also contain symbols for some of the vowel phonemes, although the said non-diacritic vowel letters are also used to write certain consonants, particularly approximants that sound similar to long vowels. A "pure" abjad is exemplified by very early forms of ancient Phoenician, though at some point it and most of the contemporary Semitic abjads had begun to overload a few of the consonant symbols with a secondary function as vowel markers, called matres lectionis. This practice was at first rare and limited in scope but became increasingly common and more developed in later times.

Addition of vowels

In the 9th century BC the Greeks adapted the Phoenician script for use in their own language. The phonetic structure of the Greek language created too many ambiguities when vowels went unrepresented, so the script was modified. They did not need letters for the guttural sounds represented by aleph, he, heth or ayin, so these symbols were assigned vocalic values. The letters waw and yod were also adapted into vowel signs; along with he, these were already used as matres lectionis in Phoenician. The major innovation of Greek was to dedicate these symbols exclusively and unambiguously to vowel sounds that could be combined arbitrarily with consonants.
Abugidas developed along a slightly different route. The basic consonantal symbol was considered to have an inherent "a" vowel sound. Hooks or short lines attached to various parts of the basic letter modify the vowel. In this way, the South Arabian abjad evolved into the Geʽez script of Ethiopia between the 5th century BC and the 5th century AD. Similarly, the Brāhmī abugida of the Indian subcontinent developed around the 3rd century BC.

Abjads and the structure of Semitic languages

The abjad form of writing is well-adapted to the morphological structure of the Semitic languages it was developed to write. This is because words in Semitic languages are formed from a root consisting of three consonants, the vowels being used to indicate inflectional or derived forms. For instance, according to Classical Arabic and Modern Standard Arabic, from the Arabic root ك‌ت‌ب K-T-B can be derived the forms كَتَبَ kataba, كَتَبْتَ katabta, يَكْتُبُ⁩ yaktubu, and مَكْتَبَة⁩ maktabah. In most cases, the absence of full glyphs for vowels makes the common root clearer, allowing readers to guess the meaning of unfamiliar words from familiar roots and improving word recognition while reading for practiced readers.

Adaptation for use as true alphabets

The Arabic abjad has been adapted to perform as true alphabets when used to write several languages, including Kurdish, Swahili, Malay, and Uyghur and historically Bosnian, Mozarabic, Aragonese, Portuguese, Spanish and Afrikaans, with some letters or letter combinations being repurposed to represent vowels. The Hebrew abjad has also been adapted to write Jewish languages like Ladino and Yiddish.

Comparative chart of abjads, extinct and extant

Name of abjad	In use	Cursive	Direction	# of letters	Matres lectionis	Area of origin	Used by	Languages	Time period	Earlier scripts that influenced this abjad	Later scripts influenced by this abjad
Arabic	yes	yes	right-left	28	3	Middle East	Over 400 million people	Arabic, Kashmiri, Persian, Pashto, Uyghur, Kurdish, Urdu, many others	512 CE	Nabataean Aramaic	Thaana Hanifi Rohingya
Syriac	yes	yes	right-left	22 consonants	3	Middle East	Syriac Christianity, Assyrians	Aramaic: Syriac, Assyrian Neo-Aramaic, Turoyo, Mlahso	BCE	Aramaic	Nabatean, Palmyran, Mandaic, Parthian, Pahlavi, Sogdian, Avestan and Manichean
Hebrew	yes	yes	right-left	22 consonants + 5 final letters	4	Middle East	Israelis, Jewish diaspora communities, Second Temple Judea	Hebrew, Judeo-Arabic, Judeo-Aramaic, Judeo-Persian, Judeo-Italian, Yiddish, Ladino, many others	2nd century BCE	Paleo-Hebrew, Early Aramaic
Aramaic	no	no	right-left	22	3	Middle East	Achaemenid Persian Empire, Sasanian Empire, Neo-Assyrian Empire and their regional satrapies	Imperial Aramaic, Hebrew	BCE	Phoenician	Late Hebrew, Nabataean, Syriac
Aramaic	no	no	right-left	22	none	Middle East	Various Semitic Peoples		BCE	Phoenician	Hebrew, Imperial Aramaic.
Nabataean	no	yes	right-left	22	none	Middle East	Nabataean Kingdom	Nabataean	200 BCE	Aramaic	Arabic
Phoenician	no	no	right-left, boustrophedon	22	none	Middle East	Canaanites	Phoenician, Punic, Hebrew	BCE	Proto-Canaanite Alphabet	Punic, Greek, Etruscan, Latin, Arabic and Hebrew
Punic	no	no	right-left	22	none	Carthage, North Africa, Mediterranean	Punic Culture	Punic, Neo-Punic	8th century BCE - 6th century CE	Phoenician
Ancient North Arabian	no	no	right-left	29	yes	Arabian Peninsula	Northern Arabians	Old Arabic,Ancient North Arabian languages	8th century BCE - 4th century CE	Proto-Sinaitic
Ancient South Arabian	no	yes	right-left, boustrophedon	29	yes	South-Arabia	D'mt Kingdom	Amharic, Tigrinya, Tigre, Semitic, Cushitic, Nilo-Saharan	900 BCE	Proto-Sinaitic	Geʽez syllabary
Sabaean	no	no	right-left, boustrophedon	29	none	Southern Arabia	Southern Arabians	Sabaean	BCE	Byblos	Ethiopic
Parthian	no	no	right-left	22	yes	Parthia	Parthian & Sassanian periods of Persian Empire	Parthian	BCE	Aramaic
Ugaritic	no	yes	left-right	30	none, 3 characters for glottal stop+vowel	Ugarit	Ugarites	Ugaritic, Hurrian	BCE	Proto-Sinaitic
Proto-Sinaitic, Proto-Canaanite	no	no	left-right	24	none	Egypt, Sinai, Canaan	Canaanites	Canaanite	BCE	In conjunction with Egyptian Hieroglyphs	Phoenician, Hebrew
Samaritan	yes	no	right-left	22	none	Levant	Samaritans	Samaritan Aramaic, Samaritan Hebrew		Paleo-Hebrew Alphabet
Tifinagh	yes	no	bottom-top, right-left, left-right,	31	yes	North Africa	Berbers	Berber languages	2nd millennium BCE	Phoenician, Arabic	Neo-Tifinagh
Middle Persian,	no	no	right-left	22	3	Middle East	Sassanian Empire	Pahlavi, Middle Persian		Aramaic	Psalter, Avestan
Psalter Pahlavi	no	yes	right-left	21	yes	Northwestern China	Persian Script for Paper Writing		CE	Syriac
Sogdian	no	no	right-left, left-right	20	3	parts of China, Uzbekistan, Tajikistan, Pakistan	Buddhists, Manichaens	Sogdian	CE	Syriac	Old Uyghur alphabet
Hanifi Rohingya	yes	no	right-left	28	2	northern Rakhine State and Chittagong	Rohingya people	Rohingya language	1980s	Arabic
Thaana	yes	yes	right-left	24	1	Maldives	Maldivians	Maldivian	17th century	Arabic, Dhives Akuru
Libyco-Berber	no	no	bottom-top,right left,left-right	23	none	North Africa	Berbers	Guanche,Garamantian	c. 7th century	Tifinagh
Chorasmian	no	no	right-left	19	none	Khwarazm	Ancient Iranian peoples	Khwarezmian language	early 8th century	Sogdian
Elymaic	no	no	right-left	22	1	Khuzestan province,Iran	Ancient Iranian peoples	Achaemenid,Aramaic	2nd century	Aramaic
Hatran	no	no	right-left	22	none	Iraq	Mesopotamians	Hatran Aramaic	100 BCE	Aramaic
Manichaean	no	no	right-left	25	2	Northwest China		Middle Iranian	2nd century	Sogdian	Palmyrene
Palmyrene	no	no	right-left	23	none	Syria		Palmyrene Aramaic	100 BCE	Aramaic,Manichaean