SafekipediaProto-Tai language
Adapted from Wikipedia · Discoverer experience
Proto-Tai is the common ancestor of many languages spoken today, such as Lao, Shan, Tai Lü, Tai Dam, Ahom, Northern Thai, Standard Thai, Bouyei, and Zhuang. Even though we don’t have any old writings in Proto-Tai, scholars have been able to guess what the language sounded like by comparing these modern languages to each other.
This process of guessing is called reconstruction, and it helps us understand how these languages developed over time. Two important scholars, Li Fang-Kuei and Pittayawat Pittayaporn, did much of this work. Li Fang-Kuei began reconstructing Proto-Tai in 1977, and later, Pittayawat Pittayaporn added more details in 2009.
Learning about Proto-Tai helps us see the connections between different cultures and languages. It shows us how people who lived long ago spoke and shared ideas, which influences the way people talk and write today.
Phonology
Consonants
The following table shows the consonants of Proto-Tai based on work by Li Fang-Kuei. Li did not specify the exact sounds of some consonants shown as [tɕ, tɕʰ and dʑ], which he described differently in his research.
Another researcher, Pittayaporn, reconstructed the consonantal sounds of Proto-Tai with some differences from Li. Pittayaporn did not include certain sounds that he believed developed later in specific Tai languages. He also suggested the existence of sounds called uvular consonants, which are not found in modern Tai languages. There are between 33 and 36 consonants, along with other sound combinations.
Tai languages generally have fewer consonants at the end of syllables than at the beginning. Li’s reconstruction of consonants at the end of syllables matches the system found in modern Thai.
Pittayaporn included additional consonants at the end of syllables that were not in earlier reconstructions.
Another researcher, Norquest, suggested the presence of a specific sound called a voiceless retroflex stop in Proto-Tai.
Norquest also proposed the existence of breathy voiced sounds in Proto-Tai.
There are also sound patterns among Proto-Tai and related languages.
Velar sounds remain the same across these languages.
Consonant clusters
Li reconstructed certain clusters of consonants at the beginning of syllables.
Pittayaporn described two types of complex beginning sounds for Proto-Tai:
- Tautosyllabic clusters – considered one syllable.
- Sesquisyllabic clusters – "one-and-a-half" syllables. These are not found in any modern Tai language.
Tautosyllabic consonant clusters from Pittayaporn include medials *-r-, *-l-, and *-w-.
Pittayaporn’s reconstruction also includes sesquisyllabic consonant clusters. Earlier work had also suggested sesquisyllables for a related language. The larger Tai-Kadai family is thought to have had disyllabic words that became single syllables in modern Tai languages. Pittayaporn believed Proto-Tai had reached the sesquisyllabic stage before simplifying to single syllables.
Examples of sesquisyllables include clusters like *p.t-, *k.t-, and others.
Vowels
Below are the vowels of Proto-Tai from Pittayaporn. Unlike Li’s system, Pittayaporn included vowel length. There are 7 vowels with length contrast and 5 diphthongs.
The diphthongs from Pittayaporn are:
- Rising: */iə/, */ɯə/, */uə/
- Falling: */ɤɰ/, */aɰ/
Tones
Proto-Tai had three contrasting tones on syllables ending with certain sounds, and no tone contrast on syllables ending with other sounds. It is often described as having four tones: *A, *B, *C, and *D, where *D is automatically assumed for certain syllables. These tones can be further divided based on voicing.
The table below shows the phonetic characteristics of Proto-Tai tones.
Proto-Tai tones developed different values and patterns in modern Tai languages based on several conditions.
Proto-Tai tones correspond to tones in Middle Chinese.
Proto-Southern Kra-Dai
In 2007, Norquest reconstructed Proto-Southern Kra-Dai, the ancestor of certain languages. It included 28 consonants, 5–7 vowels, 9 closed rimes, and at least one diphthong.
Proto-Southern Kra-Dai also included certain medial consonants.
Proto-Southern Kra-Dai includes the diphthong *ɯa(C).
Syllable structure
Unlike modern Tai languages, Proto-Tai was a sesquisyllabic language. Possible Proto-Tai syllable shapes are shown below.
During the change from Proto-Tai to modern Tai languages, the syllable structure simplified through several steps.
| Gloss | proto-Tai | p-North Tai | p-Central Tai | p-Southwest Tai |
|---|---|---|---|---|
| ‘lift’ | *ʈaːm | *r̥aːm | *tʰraːm | *haːm |
| ‘head louse’ | *ʈaw | *r̥aw | *tʰraw | *haw |
| ‘to see’ | *ʈaȵ | *r̥aȵ | *tʰran | *hen |
| ‘eye’ | *p-ʈaː | *p-ʈaː | *p-tʰraː | *taː |
| ‘die’ | *p-ʈaːj | *p-ʈaːj | *p-tʰraːj | *taːj |
| ‘grasshopper’ | *p-ʈak | *p-ʈak | *p-tʰrak | *tak |
| Gloss | proto-Tai | p-North Tai | p-Central Tai | p-Southwest Tai |
|---|---|---|---|---|
| ‘person’ | *bʱuːʔ | *buːʔ | *pʰuːʔ | *pʰuːʔ |
| ‘bowl’ | *dʱuəjʔ | *duəjʔ | *tʰuəjʔ | *tʰuəjʔ |
| ‘eggplant’ | *ɡʱɯə | *gɯə | *kʰɯə | *kʰɯə |
| ‘rice’ | *ɢʱawʔ | *ɣawʔ | *kʰawʔ | *kʰawʔ |
| p-Tai | p-Northern Tai | p-Southern Tai |
|---|---|---|
| *q- | *k- | *x- |
| *ɢ- | *ɣ- | *g- |
| *ɢʰ- | *ɣ- | *kʰ- |
| p-Tai | p-Northern Tai | p-Southern Tai |
|---|---|---|
| *x- | *x- | *x- |
| *ɣ- | *ɣ- | *ɣ- |
| Type | Labial | Alveolar | Velar | |||
|---|---|---|---|---|---|---|
| Unvoiced Stop | pr-, pl- | tr-, tl- | kr-, kl-, kw- | |||
| Aspirated unvoiced stop | pʰr-, pʰl- | tʰr-, tʰl- | kʰr-, kʰl-, kʰw- | |||
| Voiced Stop | br-, bl- | dr-, dl- | ɡr-, ɡl-, ɡw- | |||
| Implosive | ʔbr-, ʔbl- | ʔdr-, ʔdl- | ||||
| Voiceless Fricative | fr- | xr-, xw- | ||||
| Voiced Fricative | vr-, vl- | |||||
| Nasal | mr-, ml- | nr-, nl- | ŋr-, ŋl-, ŋw- | |||
| Liquid | ||||||
| Type of voicing | *A | *B | *C | *D |
|---|---|---|---|---|
| Voiceless series (Letter notation) | A1 | B1 | C1 | D1 |
| Voiceless series (Numerical notation) | 1 | 3 | 5 | 7 |
| Voiced series (Letter notation) | A2 | B2 | C2 | D2 |
| Voiced series (Numerical notation) | 2 | 4 | 6 | 8 |
| Type | *A | *B | *C | *D |
|---|---|---|---|---|
| Type of final | sonorant | sonorant | sonorant | obstruent |
| Pitch height | mid | low | high | low |
| Contour | level | low rising | high falling | low rising |
| Vowel duration | – | long | short | – |
| Voice quality | modal | creaky | glottal constriction | – |
| Type | *A | *B | *C | *DS | *DL |
|---|---|---|---|---|---|
| Voiceless (friction) | A1 | B1 | C1 | DS1 | DL1 |
| Voiceless (unaspirated) | A1 | B1 | C1 | DS1 | DL1 |
| Voiceless (glottalized) | A1 | B1 | C1 | DS1 | DL1 |
| Voiced | A2 | B2 | C2 | DS2 | DL2 |
| Proto-Tai Tone | Notes (Written Thai orthography) | Middle Chinese Tone | Chinese name | Notes (Middle Chinese) |
|---|---|---|---|---|
| *A | Unmarked | A | 平 Level (Even) | Unmarked |
| *B | Marked by -่ (mai ek) | C | 去 Departing | Marked by -H in Baxter's notation (mai tho), historically perhaps from [-s] later [-h] |
| *C | Marked by -้ (mai tho) | B | 上 Rising | Marked by -X in Baxter's notation, historically perhaps from [-ʔ] |
| *D | Unmarked or marked by -๊ (mai tri) | D | 入 Entering | Marked by -p, -t, -k |
| Type | *A | *B | *C | *DS | *DL |
|---|---|---|---|---|---|
| 1: Voiceless (friction) | huu หู ear, khaa ขา leg, hua หัว head; sɔɔŋ สอง two, maa หมา dog | khay ไข่ egg, phaa ผ่า to split, khaw เข่า knee; may ใหม่ new, sii สี่ four | khaaw ข้าว rice, sɨa เสื้อ shirt, khaa ฆ่า to kill, khay ไข้ fever, haa ห้า five; thuay ถ้วย cup, mɔɔ หม้อ pot, naa หน้า face, to wait | mat หมัด flea, suk สุก cooked/ripe, phak ผัก vegetable; hok หก six, sip สิบ ten | khaat ขาด broken/torn, ŋɨak เหงือก gums, haap หาบ to carry on a shoulder pole; khuat ขวด bottle, phuuk ผูก to tie, sɔɔk ศอก elbow, khɛɛk แขก guest, fruit |
| 2: Voiceless (unaspirated) | pii ปี year, taa ตา eye, kin กิน to eat; kaa กา teapot, plaa ปลา fish | paa ป่า forest, kay ไก่ chicken, kɛɛ แก่ old; taw เต่า turtle, paw เป่า to blow, pii ปี flute, short (height) | paa ป้า aunt (elder), klaa กล้า rice seedlings, tom ต้ม to boil; kaw เก้า nine, klay ใกล้ near, short (length) | kop กบ frog, tap ตับ liver, cep เจ็บ to hurt; pet เป็ด duck, tok ตก to fall/drop | pɔɔt ปอด lung, piik ปีก wing, tɔɔk ตอก to pound; pɛɛt แปด eight, paak ปาก mouth, taak ตาก to dry in the sun, to embrace |
| 3: Voiceless (glottalized) | bin บิน to fly, dɛɛŋ แดง red, daaw ดาว star; bay ใบ leaf, nose | baa บ่า shoulder, baaw บ่าว young man, daa ด่า to scold; ʔim อิ่ม full, (water) spring | baan บ้าน village, baa บ้า crazy, ʔaa อ้า to open (mouth); ʔɔy อ้อย sugarcane, daam ด้าม handle, daay ด้าย string | bet เบ็ด fishhook, dip ดิบ raw/unripe, ʔok อก chest; dɨk ดึก late, to extinguish | dɛɛt แดด sunshine, ʔaap อาบ to bathe, dɔɔk ดอก flower; ʔɔɔk ออก exit |
| 4: Voiced | mɨɨ มือ hand, khwaay ควาย water buffalo, naa นา ricefield; ŋuu งู snake, house | phii พี่ older sibling, phɔɔ พ่อ father, ray ไร่ dry field; naŋ นั่ง to sit, lɨay เลื่อย to saw, ashes, urine, beard | nam น้ำ water, nɔɔŋ น้อง younger sibling, may ไม้ wood, maa ม้า horse; lin ลิ้น tongue, thɔɔŋ ท้อง belly | nok นก bird, mat มัด to tie up, lak ลัก to steal; sak ซัก to wash (clothes), mot มด ant, lep เล็บ nail | miit มีด knife, luuk ลูก (one's) child, lɨat เลือด blood, nɔɔk นอก outside; chɨak เชือก rope, raak ราก root, nasal mucus, to pull |
| Gloss | Tai | Kam–Sui |
|---|---|---|
| pig | A1 | B1 |
| dog | A1 | A1 |
| rat | A1 | C1 |
| ricefield | A2 (na) | B1 (ja) |
| tongue | A2 (lin) | A2 (ma) |
| Type | Labial | Alveolar | Retroflex | Palatal | Velar | Uvular | Glottal | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unvoiced Stop | (C-)p | (C-)t | ʈ | (C-)c | (C-)k | (C-)q | (Cu)ʔ | |||||||
| Voiced Stop | (C-)b | (Ci/u)d | (Cu)ɖ | (C-)ɟ | (Ci/u)g | (C-ɢ) | ||||||||
| Unvoiced Fricative | f | s | ɕ | x | h | |||||||||
| Voiced Fricative | (C[i])v | z | ɣ | |||||||||||
| Voiced Nasal | (H-)m | (H-)n | ɲ | (H-)ŋ(w) | ||||||||||
| Liquid or Semivowel | (H-)w, j | (H-)l, r | ||||||||||||
| Type | Open syllable | Closed syllable |
|---|---|---|
| Monosyllable | *C(C)(C)V(:)T | *C(C)(C)V(:)CT |
| Sesquisyllable | *C(C).C(C)(C)V(:)T | *C(C).C(C)(C)V(:)CT |
Morphology
Robert M. W. Dixon (1998) thought that the Proto-Tai language was fusional in its morphology. This idea comes from groups of words in related languages that seem connected through ablaut.
Syntax
Proto-Tai followed a specific way of putting words together, called SVO, which means the subject comes first, then the verb, and finally the object. This is similar to how we speak in Chinese and how many modern Tai languages work today. The way Proto-Tai arranged its words was also shaped a lot by Chinese.
Lexical isoglosses
This section shows special word groups that help us understand how different languages are related.
| Gloss | p-Tai | p-Be | p-Hlai | p-Kra | p-Kam-Sui | p-Biao-Lakkja |
|---|---|---|---|---|---|---|
| ‘beard’ | *mumh | *mumX | *hmɯːmʔ | *mumʔ | *m-nrut | *m-luːt |
| ‘wet field’ | *naː | *njaː | *hnaːɦ | *naː | *ʔraːh | *raːh |
| ‘crow’ | *kaː | *ʔak | *ʔaːk | *ʔak | *qaː | *kaː |
| ‘needle’ | *qjem | *ŋaːʔ | *hŋuc | *ŋot | *tɕʰəm | *tɕʰəm |
| ‘mortar’ | *grok | *ɦoːk | *ɾəw | *ʔdru | *krˠəm | – |
| Gloss | p-Tai | p-Be | p-Hlai | p-Kra | p-Kam-Sui | p-Biao-Lakkja |
|---|---|---|---|---|---|---|
| ‘tongue’ | *linʔ | *liːnX | *hliːnʔ | *l-maː | *maː | *m-laː |
| ‘wing’ | *piːk | *pik | *pʰiːk | *ʀwaː | *C-faːh | – |
| ‘skin’ | *n̥aŋ | *n̥aŋ | *n̥əːŋ | *taː | *ŋʀaː | – |
| ‘to shoot’ | *ɲɯː | *ɲəː | *hɲɯː | – | *pɛŋh | – |
| ‘to fly’ | *ʔbil | *ʔbjən | *ɓin | – | *C-pˠənʔ | *[C-]pənh |
| Gloss | p-Tai | p-Be | p-Hlai | p-Kra | p-Kam-Sui | p-Biao-Lakkja |
|---|---|---|---|---|---|---|
| ‘bee’ | *prɯŋʔ | *ʃaːŋX | *kəːj | *reː | *luk | *mlet |
| ‘vegetable’ | *prak | *ʃak | *ɓɯː ʈʂʰəj | *ʔop | *ʔmaː | – |
| ‘red’ | *C-djeːŋ | *r̥iŋ | *hraːnʔ | – | *hlaːnʔ | – |
| ‘to bite’ | *ɢɦap | *gap | *hŋaːɲʔ | *ʈajh | *klət | *kat |
| ‘to descend’ | *N-ɭoŋ | *roːŋ | *l̥uːj | *caɰʔ | *C-ɭuːjh | *lojʔ |
Proto-Tai prenasalized nasals and Old Chinese
Ostapirat (2023) noticed that in Proto-Hmong–Mien, sounds that start with special breathy consonants in Proto-Tai often match with similar breathy consonant sounds in Old Chinese. The Old Chinese reconstructions come from Baxter & Sagart in 2014.
Related articles
This article is a child-friendly adaptation of the Wikipedia article on Proto-Tai language, available under CC BY-SA 4.0.