The Indo-European languages are a language family native to the overwhelming majority of Europe, the Iranian plateau, and the northern Indian subcontinent. Some European languages of this family—English, French, Portuguese, Russian, Dutch, and Spanish—have expanded through colonialism in the modern period and are now spoken across several continents. The Indo-European family is divided into several branches or sub-families, of which there are eight groups with languages still alive today: Albanian, Armenian, Balto-Slavic, Celtic, Germanic, Hellenic, Indo-Iranian, and Italic; another nine subdivisions are now extinct.
A sound change, in historical linguistics, is a change in the pronunciation of a language. A sound change can involve the replacement of one speech sound by a different one or a more general change to the speech sounds that exist, such as the merger of two sounds or the creation of a new sound. A sound change can eliminate the affected sound, or a new sound can be added. Sound changes can be environmentally conditioned if the change occurs in only some sound environments, and not others.
Grimm's law is a set of sound laws describing the Proto-Indo-European (PIE) stop consonants as they developed in Proto-Germanic in the 1st millennium BC. First discovered by Rasmus Rask but systematically put forward by Jacob Grimm, it establishes a set of regular correspondences between early Germanic stops and fricatives and stop consonants of certain other centum Indo-European languages.
Historical linguistics, also termed diachronic linguistics, is the scientific study of language change over time. Principal concerns of historical linguistics include:
- to describe and account for observed changes in particular languages
- to reconstruct the pre-history of languages and to determine their relatedness, grouping them into language families
- to develop general theories about how and why language changes
- to describe the history of speech communities
- to study the history of words, i.e. etymology
- to explore the impact of cultural and social factors on language evolution.
Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family. No direct record of Proto-Indo-European exists; its proposed features have been derived by linguistic reconstruction from documented Indo-European languages.
The Balto-Slavic languages form a branch of the Indo-European family of languages, traditionally comprising the Baltic and Slavic languages. Baltic and Slavic languages share several linguistic traits not found in any other Indo-European branch, which points to a period of common development and origin.
The ruki sound law, also known as the ruki rule or iurk rule, is a historical sound change that took place in the satem branches of the Indo-European language family, namely in Balto-Slavic, Armenian, and Indo-Iranian. According to this sound law, an original *s changed to *š after the consonants *r, *k, *g, *gʰ and the semi-vowels *w (*u̯) and *y (*i̯), as well as the syllabic allophones *r̥, *i, and *u:
The glottalic theory is that Proto-Indo-European had ejective or otherwise non-pulmonic stops, *pʼ *tʼ *kʼ, instead of the plain voiced ones, *b *d *ɡ as hypothesized by the usual Proto-Indo-European phonological reconstructions.
Proto-Balto-Slavic is a reconstructed hypothetical proto-language descending from Proto-Indo-European (PIE). From Proto-Balto-Slavic, the later Balto-Slavic languages are thought to have developed, composed of the Baltic and Slavic sub-branches, and including modern Lithuanian, Polish, Russian and Serbo-Croatian, among others.
As the Proto-Indo-European language (PIE) broke up, its sound system diverged as well, as evidenced in various sound laws associated with the daughter Indo-European languages.
The phonology of the Proto-Indo-European language (PIE) has been reconstructed by linguists, based on the similarities and differences among current and extinct Indo-European languages. Because PIE was not written, linguists must rely on the evidence of its earliest attested descendants, such as Hittite, Sanskrit, Ancient Greek, and Latin, to reconstruct its phonology.
Hirt's law or Hirt–Illich-Svitych's law, named after Hermann Hirt, who originally postulated it in 1895, is a Balto-Slavic sound law that triggered the retraction of the accent under certain conditions.
Pedersen's law, named after the Danish linguist Holger Pedersen, is a law of accentuation in Balto-Slavic languages which states that the stress was retracted from stressed medial syllables in paradigms with mobile accent.
Proto-Indo-European accent refers to the accentual (stress) system of the Proto-Indo-European language.
Osthoff's law is an Indo-European sound law which states that long vowels shorten when followed by a resonant, followed in turn by another consonant. It is named after German Indo-Europeanist Hermann Osthoff, who first formulated it.
Languages of the Indo-European family are classified as either centum languages or satem languages according to how the dorsal consonants of the reconstructed Proto-Indo-European language (PIE) developed. An example of the different developments is provided by the words for "hundred" found in the early attested Indo-European languages. In centum languages, they typically began with a sound, but in satem languages, they often began with.
Proto-Slavic is the unattested, reconstructed proto-language of all Slavic languages. It represents Slavic speech approximately from the 2nd millennium BC through the 6th century AD. As with most other proto-languages, no attested writings have been found; scholars have reconstructed the language by applying the comparative method to all the attested Slavic languages and by taking into account other Indo-European languages.
This glossary gives a general overview of the various sound laws that have been formulated by linguists for the various Indo-European languages. A concise description is given for each rule; more details are given in their articles.
The Proto-Slavic language, the hypothetical ancestor of the modern-day Slavic languages, developed from the ancestral Proto-Balto-Slavic language, which is the parent language of the Balto-Slavic languages. The first 2,000 years or so consist of the pre-Slavic era, a long period during which none of the later dialectal differences between Slavic languages had yet emerged. The last stage in which the language remained without internal differences that later characterize different Slavic languages can be dated around AD 500 and is sometimes termed Proto-Slavic proper or Early Common Slavic. Following this is the Common Slavic period, during which the first dialectal differences appeared but the entire Slavic-speaking area continued to function as a single language, with sound changes tending to spread throughout the entire area. By around 1000, the area had broken up into separate East Slavic, West Slavic and South Slavic languages, and in the following centuries it broke up further into the various modern Slavic languages of which the following are extant: Belarusian, Russian, Rusyn and Ukrainian in the East; Czech, Slovak, Polish, Kashubian and the Sorbian languages in the West, and Bulgarian, Macedonian, Serbo-Croatian and Slovenian in the South.
Weise's law is a Proto-Indo-European sound law that causes the depalatalization of the palatovelar consonants *ḱ *ǵ *ǵʰ in certain contexts. In short, when *ḱ *ǵ *ǵʰ are followed by *r, they are depalatalized and thus merge with the plain velars *k *g *gʰ, respectively. Although this sound change is most prominent in the satem languages, it is believed that the change must have occurred prior to the centum-satem division, based on an earlier sound change that affected the distribution of Proto-Indo-European *u and *r. The law is named after German linguist Oskar Weise, who first postulated it in 1881 as the solution to a cognate correlation problem between Ancient Greek and Sanskrit.