Proto-Hlai


Proto-Hlai is the reconstructed ancestor of the Hlai languages. Proto-Hlai reconstructions include those of Matisoff, Thurgood, Wu, Ostapirat, and Norquest.

Phonology

Peter K. Norquest reconstructs 29 basic Proto-Hlai consonants, while Weera Ostapirat reconstructs only 19 proto-consonants.
LabialAlveolarPostalveolarPalatalVelarGlottal
Glottal or Implosiveɓɗtɕkʔ
Unvoiced Aspiratedpʰtʰtʃʰtɕʰkʰ
Unvoiced Fricativefs
Voiced FricativeC-βɦ
Unvoiced Nasalm̥n̥ɲ̊ŋ̊
Voiced NasalC-mC-nC-ɲC-ŋ
Unvoiced Lateralʰl
Voiced LateralC-l
Tapɾ
Trillr
Unvoiced Approximantʍȷ̊
Voiced Approximantʋ

Norquest additionally reconstructs six onsets suggesting consonant clusters:. Whether these were actual consonant clusters is not clear. The clusters with a glide as a second member may have been coarticulated consonants: palatalized, labialized, while *pl may have arisen from a sesquisyllable *p-l.
Norquest also reconstructs six bisyllabic root shapes:
Pretonic syllables are later lost in all Hlai languages, but in these six combinations, they trigger in some languages conditional developments of the tonic syllable's onset consonant, allowing them to be distinguished in reconstruction.
In Ostapirat's reconstruction, Proto-Hlai forms can be both monosyllabic and disyllabic. Some disyllabic forms have medial consonants beginning with three penultimate vowels. Vowels can also combine with *-i or *-u to form diphthongs. Tones are also reconstructed.
In the table below, Proto-Hlai consonants marked as green can occur at the end of syllables.
There is a total of 4-5 Proto-Hlai vowels in Norquest's reconstruction. Ostapirat reconstructs 5 vowels, which are /a, ə, i, ɨ, u/.
HeightFrontCentralBack
Close
Mid
Open

There are 7 possible closed rimes in Norquest's reconstruction of Proto-Hlai, not counting vowel length.
The transition from Pre-Hlai to Proto-Hlai involved the following series of sound changes.
  1. Elimination of Uvulars – loss of Pre-Hlai uvulars *q, *C-q, *C-ɢ
  2. Intervocalic Lenition – -p- > -ʋ-, -t- > -ɾ-, -k- > -ɦ-, etc.
  3. Initial Devoicing – loss of voiced fricatives, etc.
  4. Vocalic Transfer – vowel in penultimate syllable moved to last syllable
  5. Initial Aspiration
  6. Monosyllabification – Pre-Hlai, which was sesquisyllabic, was reduced to monosyllabic forms in Proto-Hlai.
  7. Stop and Fricative Affrication – ʈʰ > tʃʰ, cʰ > tɕʰ, etc.
  8. Peripheral Vowel Raising – e > i, o > u, ɛː > eː, ɔC > oC
  9. Monophthongization – *ɯa > *ɯə > *ɯː, *oːy > *wiː > *iː
Or, in the sequential order given in Norquest, which excludes monophthongization:
  1. Intervocalic lenition
  2. Elimation of uvulars
  3. Peripheral vowel raising
  4. Initial devoicing
  5. Vocalic Transfer
  6. Initial aspiration
  7. Monosyllabification
  8. Stop and fricative affrication
After evolving from Pre-Hlai, Proto-Hlai initials went through 4 main types of sound changes.
  1. Temporal compression – reduction of constituents in the syllable; most common
  2. Gesture reduction
  3. Onset fortition – change to initial aspiration, etc.
  4. Systemic realignment – mergers, etc.
After the breakup of Proto-Hlai, the following sound changes occurred in various Hlai branches.
  1. Devoicing
  2. Registrogenesis – creation of tone registers ; most likely influenced by Hainanese Min Chinese
The following table gives the reflexes of the onset consonants in the Hlai languages, as well as Norquest and Ostapirat's reconstructions:
The symbol ↓ indicates here a lowered tone on the following vowel in those Hlai languages where tone split has taken place; this normally occurs following earlier voiced consonants.