Pāṇini in the context of Metalanguage

Sanskrit (/ˈsænskrɪt/; stem form संस्कृत; nominal singular संस्कृतम्, saṃskṛtam,) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had diffused there from the northwest in the late Bronze Age. Sanskrit is the sacred language of Hinduism, the language of classical Hindu philosophy, and of historical texts of Buddhism and Jainism. It was a link language in ancient and medieval South Asia, and upon transmission of Hindu and Buddhist culture to Southeast Asia, East Asia and Central Asia in the early medieval era, it became a language of religion and high culture, and of the political elites in some of these regions. As a result, Sanskrit had a lasting effect on the languages of South Asia, Southeast Asia and East Asia, especially in their formal and learned vocabularies.

Sanskrit generally connotes several Old Indo-Aryan language varieties. The most archaic of these is the Vedic Sanskrit found in the Rigveda, a collection of 1,028 hymns composed between 1500 and 1200 BCE by Indo-Aryan tribes migrating east from the mountains of what is today northern Afghanistan across northern Pakistan and into northwestern India. Vedic Sanskrit interacted with the preexisting ancient languages of the subcontinent, absorbing names of newly encountered plants and animals; in addition, the ancient Dravidian languages influenced Sanskrit's phonology and syntax. Sanskrit can also more narrowly refer to Classical Sanskrit, a refined and standardized grammatical form that emerged in the mid-1st millennium BCE and was codified in the most comprehensive of ancient grammars, the Aṣṭādhyāyī ('Eight chapters') of Pāṇini. The greatest dramatist in Sanskrit, Kālidāsa, wrote in classical Sanskrit, and the foundations of modern arithmetic were first described in classical Sanskrit. The two major Sanskrit epics, the Mahābhārata and the Rāmāyaṇa, however, were composed in a range of oral storytelling registers called Epic Sanskrit which was used in northern India between 400 BCE and 300 CE, and roughly contemporary with classical Sanskrit. In the following centuries, Sanskrit became tradition-bound, stopped being learned as a first language, and ultimately stopped developing as a living language.

Sanskrit literature is a broad term for all literature composed in Sanskrit. This includes texts composed in the earliest attested descendant of the Proto-Indo-Aryan language known as Vedic Sanskrit, texts in Classical Sanskrit as well as some mixed and non-standard forms of Sanskrit. Literature in the older language begins during the Vedic period with the composition of the Rigveda between about 1500 and 1000 BCE, followed by other Vedic works right up to the time of the grammarian Pāṇini around 6th or 4th century BCE (after which Classical Sanskrit texts gradually became the norm).

Vedic Sanskrit is the language of the extensive liturgical works of the Vedic religion, while Classical Sanskrit is the language of many of the prominent texts associated with the major Indian religions, especially Hinduism and the Hindu texts, but also Buddhism, and Jainism. Some Sanskrit Buddhist texts are also composed in a version of Sanskrit often called Buddhist Hybrid Sanskrit or Buddhistic Sanskrit, which contains many Middle Indic (prakritic) elements not found in other forms of Sanskrit.

The Aṣṭādhyāyī (/ˌæstədˈjɑː(j)i/; Sanskrit: अष्टाध्यायी [ɐʂʈaːdʱjáːjiː]) is a grammar text that describes a form of the Sanskrit language.

Authored by the ancient Sanskrit scholar Pāṇini and dated to around 6th c. BCE, 6-5th c. BCE and 4th c. BCE, it describes the language as current in his time, specifically the dialect and register of an elite of model speakers, referred to by Pāṇini himself as śiṣṭa. The work also accounts both for some features specific to the older Vedic form of the language, as well as certain dialectal features current in the author's time.

Vāsudeva (/ˌvɑːsuˈdeɪvə/; Sanskrit: वासुदेव [ʋɑːsudéːʋɐ]), later incorporated as Vāsudeva-Krishna (Vāsudeva-Kṛṣṇa, "Krishna, son of Vasudeva"), Krishna-Vāsudeva or simply Krishna, was the son of Vasudeva Anakadundubhi, king of the Vrishnis in the region of Mathura. He was a leading member of the legendary Vrishni heroes, and may well have been a historical ruler in the region of Mathura.

Vāsudevism arose with the decline of Vedism in India, which occurred during the 8th to 6th century BCE. Vāsudeva then became the object of one of the earliest forms of personal deity worship in India, and is attested from around the 4th century BCE. At that time, Vāsudeva was already considered as a deity, as he appears in Pāṇini's writings in conjunction with Arjuna as an object of worship, since Pāṇini explains that a vāsudevaka is a devotee (bhakta) of Vāsudeva.

Indian philosophy, the systems of thought and reflection that were developed by the civilizations of the Indian subcontinent. They include both orthodox (astika) systems, namely, the Nyaya, Vaisheshika, Samkhya, Yoga, Purva-Mimamsa (or Mimamsa), and Vedanta (Advaita, Dwaita, Bhedbheda, Vishistadvaita), and unorthodox (nastika) systems, such as Buddhism, Jainism, Ajivika, Ajnana, Charvaka etc. as well as other schools such as Raseswera, Paninya, Pratyabhijna, Pasupata Shaivism, Shaivism etc. Indian thought has been concerned with various philosophical problems, significant among which are the nature of the world (cosmology), the nature of reality (metaphysics), logic, the nature of knowledge (epistemology), ethics, and the philosophy of religion etc. Some of the most famous and influential philosophers of all time were from the Indian Subcontinent such as Buddha, Nagarjuna, Adi Sankara, etc. This list is until 14th century CE.

The grammar of the Sanskrit language has a complex verbal system, rich nominal declension, and extensive use of compound nouns. It was studied and codified by Sanskrit grammarians from the later Vedic period (roughly 8th century BCE), culminating in the Pāṇinian grammar of the 4th century BCE.

Birch bark manuscripts are documents written on pieces of the outer layer of birch bark, which was commonly used for writing before the mass production of paper. Evidence of birch bark for writing goes back many centuries and appears in various cultures. The oldest such manuscripts are the numerous Gandhāran Buddhist texts from approximately the 1st century CE, from what is now Afghanistan. They contain among the earliest known versions of significant Buddhist scriptures, including a Dhammapada, discourses of Buddha that include the Rhinoceros Sutra, Avadanas and Abhidharma texts.

Sanskrit birch bark manuscripts written with Brahmi script have been dated to the first few centuries CE. Several early Sanskrit writers, such as Kālidāsa (c. 4th century CE), Sushruta (c. 3rd century CE), and Varāhamihira (6th century CE) mention its use for manuscripts. The bark of Betula utilis (Himalayan Birch) is still used today in India and Nepal for writing sacred mantras. Russian texts discovered in Veliky Novgorod have been dated to approximately the 11th to 15th centuries CE. Most of those documents are letters written by various people in a local dialect, Old Novgorodian. The Irish language's native writing system Ogham, sometimes called the "tree alphabet", was traditionally attributed to the god Ogma who wrote a proscription on birch to Lugh, warning him; the text of this proscription can be found in the Book of Ballymote. The first letter of Ogham is beith; beithe means "birch".

Lipi means 'writing, letters, alphabet', and contextually refers to scripts, the art or manner of writing, or in modified form such as lipī to painting, decorating or anointing a surface to express something.

The term lipi appears in multiple texts of Hinduism, Buddhism, and Jainism, some of which have been dated to the 1st millennium BCE in ancient India. Section 3.2.21 of Pāṇini's Aṣṭādhyāyī (around 500 BCE), mentions lipi in the context of writing. However, Panini does not describe or name the specific name of Sanskrit script. The Arthashastra (200 BCE - 300 CE), in section 1.2–5, asserts that lipi was a part of the education system in ancient India.

In morphology, a null morpheme or zero morpheme is a morpheme that has no phonetic form. In simpler terms, a null morpheme is an "invisible" affix. It is a concept useful for analysis, by contrasting null morphemes with alternatives that do have some phonetic realization. The null morpheme is represented as either the figure zero (0) or the empty set symbol ∅.

In most languages, it is the affixes that are realized as null morphemes, indicating that the derived form does not differ from the stem. For example, plural form sheep can be analyzed as combination of sheep with added null affix for the plural. The process of adding a null affix is called null affixation, null derivation or zero derivation. The concept was first used by the 4th century BCE Sanskrit grammarian from ancient India, Pāṇini, in his Sanskrit grammar.

Mahabhashya (Sanskrit: महाभाष्य, IAST: Mahābhāṣya, IPA: [mɐɦaːbʱaːʂjɐ], "Great Commentary"), attributed to Patañjali, is a commentary on selected rules of Sanskrit grammar from Pāṇini's treatise, the Aṣṭādhyāyī, as well as Kātyāyana's Vārttika-sūtra, an elaboration of Pāṇini's grammar. It is dated to the 2nd century BCE.

Vyākaraṇa (Sanskrit: व्याकरण, lit. 'explanation, analysis', IPA: [ˈʋjaːkɐrɐɳɐ]) refers to one of the six ancient Vedangas, ancillary science connected with the Vedas, which are scriptures in Hinduism. Vyākaraṇa is the study of grammar and linguistic analysis in the Sanskrit language.

Pāṇini and Yāska are the two celebrated ancient scholars of Vyākaraṇa; both are dated to several centuries prior to the start of the common era, with Pāṇini likely from the fifth century BCE. Pāṇini's Aṣṭādhyāyī is the most important surviving text of the Vyākaraṇa traditions. This text, as its very title suggests, consists of eight chapters, each divided into four padas, cumulatively containing 4000 sutras. The text is preceded by abbreviation rules grouping the phonemes of Sanskrit. Pāṇini quotes ten ancient authorities whose texts have not survived, but they are believed to have been Vyākaraṇa scholars.

The Vrishni heroes (IAST: Vṛṣṇi vīras), also referred to as Pancha-viras (IAST: Pañca vīras; 'the five heroes'), are a group of five legendary, potentially semi-historical deified heroes who are found in the literature and archaeological sites of ancient India. Their earliest worship is attestable in the clan of the Vrishnis near Mathura by 4th-century BCE. Legends are associated with these deified heroes, some of which may be based on real, historical heroes of the Vrishni clan. Their early worship has been variously described as cross-sectarian, much like the cult of the Yakshas, related to the early Bhagavata tradition of Hinduism, and with possible links to Jainism as well. They and their legends – particularly of Krishna and Balarama – have been an important part of the Vaishnava tradition of Hinduism.

The Vrishnis were already known in the late Vedic literature. They are also mentioned by Pāṇini in Astadhyayi verse 6.2.34, while Krishna is referred to as Krishna Varshneya ("the Vrishni") in verse 3.187.51 of the Mahabharata. Beyond texts, their importance in ancient India is attested by the ancient inscriptions found near Mathura and coins discovered in the ruins of Ai-Khanoum (Afghanistan), bearing images of the two main Vrishni heroes, with Greek and Brahmi legends.

Grassmann's law, named after its discoverer Hermann Grassmann, is a dissimilatory phonological process in Ancient Greek and Sanskrit which states that if an aspirated consonant is followed by another aspirated consonant in the next syllable, the first one loses the aspiration. The descriptive version was given for Sanskrit by Pāṇini.

Here are some examples in Greek of the effects of Grassmann's law: