[ʔ]→[o]Certainty: 5/5Commonality: 3/5

O-Coloring Labialization Laryngeal Theory Indo-European Hellenic

Glottal stop to Close-mid back rounded vowel

The shift from a glottal stop to the vowel [o] is a cornerstone of the Laryngeal Theory, where a labialized laryngeal consonant (h3) colors adjacent vowels toward a rounded back quality.

Phonetic Effects

O-Coloring, Labialization, Laryngeal Theory

Language Examples

Ancient Greek Hellenic

*dh₃-tós→dotós— Vocalization of the third laryngeal (possibly a labialized glottal stop) into [o].

Proto-Indo-European Indo-European

*h₃→o— The O-coloring effect on adjacent vowels by a reconstructed labialized laryngeal.

Related Transformations

Reverse A-coloring Neutral coloring

More Indo-European Shifts

[d] → [dʑ] — Palatalization [e] → [o] — Backing [ei] → [e] — Monophthongization [∅] → [ã] — Compensatory Nasalization [∅] → [ẽ] — Compensatory Nasalization

Sources & References

Spotted a mistake or have a better example?

EchoDrift is community-driven. You can suggest a change directly through GitHub.

Propose an Edit on GitHub