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Weise's law

Weise's law is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Weise's law rather than just read about it. In short: In historical linguistics, Weise's law describes the loss of palatal quality that some consonants undergo in specific contexts in the Proto-Indo-European language. In short, when the palatovelar consonants *ḱ *ǵ *ǵʰ are followed by *r, they lose their palatal quality, leading to a loss in distinction between the series and the corresponding plain velar consonants *k *g *gʰ.

Weise's law — main illustration
Weise's law — illustration

Key takeaways

  • Weise's law belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Weise's law to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Weise's law from memory before moving on to harder problems.

Reference excerpt

In historical linguistics, Weise's law describes the loss of palatal quality that some consonants undergo in specific contexts in the Proto-Indo-European language. In short, when the palatovelar consonants *ḱ *ǵ *ǵʰ are followed by *r, they lose their palatal quality, leading to a loss in distinction between the series and the corresponding plain velar consonants *k *g *gʰ. Some exceptions exist, such as when the *r is followed by *i or when the palatal form is restored by analogy with related words. Although this sound change is most prominent in the satem languages, the change probably occurred prior to the centum–satem division, based on an earlier sound change which affected the distribution of Proto-Indo-European *u and *r. The law is named after the German linguist Oskar Weise, who first postulated it in 1881 in order to reconcile cognates in Ancient Greek and Sanskrit.

Terminology The Proto-Indo-European language is the reconstructed ancestor of all the Indo-European languages. It was spoken around the 4th millennium BC or earlier. No record of the language exists, but its forms have been reconstructed through the comparative method. Weise's law describes a sound change that affects the palatovelar consonants of Proto-Indo-European, sometimes called dorso-palatal or simply palatal consonants. These sounds are articulated both with the back part of the tongue and the hard palate of the mouth, represented with *ḱ, *ǵ, and *ǵʰ, where the asterisk signifies a reconstructed or unattested form. They are contrasted with plain velar consonants, also referred to as dorso-velar or simply velar consonants, which are articulated with the back part of the tongue and the soft palate, represented by *k, *g, and *gʰ. Both of these sets were further contrasted with the labiovelar consonants, likely pronounced with a simultaneous articulation with the back part of the tongue against the soft palate and the rounding of the lips, represented by *kʷ, *gʷ, and *gʷʰ. These three contrastive sets are often known collectively as guttural consonants. Although only one branch of the Indo-European language family – the Anatolian languages – maintained a distinction between all three sets of consonants, historical linguists divide the Indo-European daughter languages into two categories based on how these sounds developed, namely the centum and the satem languages. In the centum languages, the palatovelar sounds lost their palatal quality and merged with the plain velars, creating only a two-way contrast between the plain velar and labiovelar sounds. The terms centum and satem are derived from the Proto-Indo-European word *dḱm̥tóm, later shortened into *ḱm̥tóm, meaning 'one hundred'. Centum languages, named after the Latin word for 'one hundred', are those languages in which the palatovelar sounds underwent depalatalization – that is, lost their palatal quality – thereby merging with the plain velars, creating only a two-way contrast between the plain velar and labiovelar sounds. By contrast, satem languages, named after the Avestan word for 'one hundred' (𐬯𐬀𐬙𐬆𐬨, satəm), are those in which the labiovelar sounds lost their labialization, causing a lack of differentiation with the plain velar sounds called a merger. The palatovelar sounds, on the other hand, underwent assibilation – also called satemization in this particular context – whereby these palatovelars became sibilant consonants. Sibilant consonants comprise affricates, such as [t͡ʃ] (as in chat), and fricatives, such as [s] (as in sunk).

History

The German linguist Oskar Weise first described a problem in correspondences between Ancient Greek and Sanskrit cognates in his 1881 article "Ist anlautendes γ vor λ abgefallen?" ('Is initial γ dropped before λ?'). In it, he notes an imbalance in the relationship between Ancient Greek and Sanskrit cognates, writing:

If we examine the Indic words beginning with guttural + r or l and compare them with their Greek reflexes, we will notice that all those which have retained the guttural in Indic intact show guttural + ρ, whereas Greek guttural + λ only occurs regularly when the palatal sibilants [ś ], j, h appear in Indic. The absence of exceptions in this rule automatically prohibits the assumption that coincidence prevailed here. Of course, this excludes cases where r (or l ) is not immediately after the guttural, but there is a vowel in between, although the rule stated above often applies here too.

According to Alwin Kloekhorst in 2011, Weise's original article has "been largely forgotten by the scholarly world", but its findings have appeared sporadically in linguistic literature with some of it needing revision in light of other research. In 1894, Antoine Meillet described the law and defended it as established fact in a dissertation for the Société de Linguistique de Paris on the difficulty of determining gutturals in Proto-Indo-European, citing Weise as its progenitor. In 1978, Frederik Kortlandt similarly considered Weise's findings strong but limited in scope, citing both Weise's and Meillet's works on the law in his own research on the Balto-Slavic languages. In 1995, Robert S. P. Beekes also described the process derived from the law, but did not reference its origins with Weise. Kloekhorst presented a defense of the law in 2008, followed by a more complete account – Weise's Law: Depalatalization of Palatovelars before *r in Sanskrit – in 2011. The 2011 defense conglomerates several different sources on the topic, some referencing Weise and some not, and summarizes its general characteristics, its relative chronology, and possible violations. Kloekhorst has been credited with reviving interest in the law.

Overview

… excerpt ends here. Continue reading the full article.

Illustrations

Weise's law illustration
Weise's law illustration
Weise's law illustration
Weise's law: Migrations by the Yamnaya culture from around Pontic–Caspian steppe likely spread the Indo-European languages through parts of Europe and Asia during the 3rd millennium BC, which supports the steppe hypothesis in the Proto-Indo-European homeland debate.[37] .mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Estimated range of the Yamnaya culture before its migration   Extent of modern Indo-European languages in Europe and Asia
Migrations by the Yamnaya culture from around Pontic–Caspian steppe likely spread the Indo-European languages through parts of Europe and Asia during the 3rd millennium BC, which supports the steppe hypothesis in the Proto-Indo-European homeland debate.[37] .mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Estimated range of the Yamnaya culture before its migration   Extent of modern Indo-European languages in Europe and Asia

Worked examples

Example 1 — a first encounter with Weise's law

Start with the simplest possible case. Write down what Weise's law claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Weise's law before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Weise's law ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Weise's law

In research
Weise's law appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Weise's law in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Weise's law is common in secondary-school and first-year university syllabi. It links to neighbouring topics Indo-European sound laws, Linguistic morphology, so understanding it makes those chapters shorter.
In everyday life
Look for Weise's law outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Weise's law in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Weise's law means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Weise's law out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Weise's law in simple terms?

In historical linguistics, Weise's law describes the loss of palatal quality that some consonants undergo in specific contexts in the Proto-Indo-European language. In short, when the palatovelar consonants *ḱ *ǵ *ǵʰ are followed by *r, they lose their palatal quality, leading to a loss in distincti…

Why does Weise's law matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Weise's law?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Weise's law.

Tags

  • Indo-European sound laws
  • Linguistic morphology

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