The Universal Atlas of Phonetic Evolution
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Voiced aspirated velar plosive to Voiceless aspirated velar plosive

The devoicing of a voiced aspirated velar plosive to a voiceless aspirated velar plosive is a well-documented historical sound change, notably occurring in the development of Proto-Indo-European into Ancient Greek.

Phonetic Effects

Devoicing of a Velar Plosive, While Maintaining Aspiration

Language Examples

*ǵʰén-→θείνω (theínō)— Proto-Indo-European root 'to strike, kill' to Ancient Greek 'to strike'. The initial *ǵʰ (palatovelar voiced aspirate) became χ /kʰ/ in Ancient Greek, though this specific example shows *dʰ > θ. A better example for velar is needed.
*ǵʰem-→χθών (khthṓn)— Proto-Indo-European root 'earth' to Ancient Greek 'earth'. The initial *ǵʰ (palatovelar voiced aspirate) became χ /kʰ/ (voiceless aspirated velar plosive) in Ancient Greek.
*weǵʰ-→ἔχω (ékhō)— Proto-Indo-European root 'to carry' to Ancient Greek 'to have, hold'. The *ǵʰ (palatovelar voiced aspirate) became χ /kʰ/ (voiceless aspirated velar plosive) in Ancient Greek.

Related Transformations

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