Indo-European Ablaut - Preliminary Considerations

Preliminary Considerations

Vowel gradation is any vowel difference between two related words (e.g. photograph and photography ) or two forms of the same word (e.g. man and men). The difference need not be indicated in the spelling. There are many kinds of vowel gradation in English and other languages, and these are discussed generally in the article apophony. Some involve a variation in vowel length (quantitative gradation: photograph and photography), others in vowel colouring (qualitative gradation: man/men), and others the complete disappearance of a vowel (reduction to zero: could not → couldn't).

For the study of European languages, one of the most important instances of vowel gradation is the historical Indo-European phenomenon called ablaut, remnants of which can be seen in the English verbs ride, rode, ridden, or fly, flew, flown. For many purposes it is enough to note that these verbs are irregular, but understanding why they are irregular (and indeed why they are actually perfectly regular within their own terms) requires digging back into the grammar of the reconstructed proto-language.

Ablaut is the oldest and most extensive single source of vowel gradation in the Indo-European languages, and must be distinguished clearly from other forms of gradation which developed later, such as Germanic umlaut (man/men, goose/geese, long/length) or the results of English word-stress patterns (man/woman, photograph/photography). Confusingly, in some contexts, the terms 'ablaut', 'vowel gradation', 'apophony' and 'vowel alternation' may be used synonymously, especially in synchronic comparisons, but historical linguists prefer to keep 'ablaut' for the specific Indo-European phenomenon, which is the meaning intended by the linguists who first coined the word.

Since ablaut was a regular system in Proto-Indo-European, but survives only as irregular or partially regular variations in the recorded languages, any explanation of the topic has to begin with the prehistoric origins. Proto-Indo-European (PIE) is the hypothetical parent language from which most of the modern and ancient European languages evolved. By comparing the recorded forms from the daughter languages, linguists can infer the forms of the parent language. However, it is not certain how PIE was realised phonetically, and the reconstructions are to be understood as an encoding of the deduced phonemes; there is no correct way to pronounce them. All PIE forms are marked with an asterisk to indicate that they are hypothetical. For more details on these reconstructions, see Proto-Indo-European, Laryngeal theory and Comparative method.