Like Old Vietnamese, Written Burmese and Proto-Hmong-Mien, the Kra-Dai languages exhibit a phonological typology strongly influenced by a form of Chinese which is later than Old Chinese and earlier than Early Middle Chinese: that is, a period extending beginning c. 200 BCE and covering the first half of the first millennium CE. Their tone system is structurally identical to that of Chinese of that time: three contrasting tones on words ending in sonorants (vowels, semi-vowels, nasals, liquids) while words ending in oral stops do not show any tonal contrast. The origin of the Vietnamese tone system was elucidated by Haudricourt (1954a): one tone originated in words ending in [h], another in [ʔ], a third in sonorants. Haudricourt (1954b) showed that the Chinese qùshēng 去聲 originated in an *-s suffix which evolved to [h] prior to becoming a tone. Mei (1970) completed Haudricourt’s picture by proposing that the Chinese shǎngshēng 上聲 goes back to words ending in a glottal stop. For details see Sagart (1999). The origins of the Burmese, Hmong-Mien and Kra-Dai tones have not been elucidated although some progress has been made for Kra-Dai by Ostapirat (2005) and Norquest (2013). Here I describe additional hypotheses which bring us closer to a solution.
The Kra-Dai tones are known as A, B, C and D. The core of these categories existed in Proto-Kra-Dai (Ostapirat 2000), though not necessarily as true phonetic tones having pitch as their main acoustic clue. When borrowed into Kra-Dai, Middle Chinese píngshēng 平聲 words (ending in sonorants in Old Chinese) typically have tone A; Middle Chinese shǎngshēng 上聲 words (ending in a glottal stop in Old Chinese) are treated by tone C; MC qùshēng 去聲 words (ending in *-h in late OC < OC *-s) show tone B. Chinese words ending in oral stops form the so-called rùshēng入聲 category. They do not contrast with the other Chinese tones. Kra-Dai ‘tone’ D is the corresponding category in Kra-Dai. Gedney (1978) suggests that the phonetic values of the Thai tones A, B and C are the same as the Old Chinese values of the Chinese píngshēng, qùshēng and shǎngshēng respectively, under the Haudricourt-Mei solution: sonorant endings, [h]-endings, [ʔ]-endings. Earlier attempts to solve the origin of Kra-Dai tones have assumed Gedney’s hypothesis.
Sagart (2004, 2005, 2008, 2011) argued that the Kra-Dai languages are a subgroup, not a sister, of the Austronesian language family. Here I attempt an account of the Kra-Dai tone categories from the viewpoint of Austronesian consonant endings. It should be borne in mind that the AN words in Kra-Dai, while very basic, are quantitatively limited: for that reason my proposals are based on small numbers of examples. This post deals with the Kra-Dai tone C. Two other posts deal with tones B (here) and A (here).
In examining the Kra-Dai tone categories in connexion with Austronesian, reference must be made to Tsuchida’s reconstruction of two final consonants (Tsuchida 1976): *H1 (-h in Pazeh, Saisiyat, Atayal, Sediq, Amis and Aklanon) and *H2 (-h in Takituduh and Aklanon). AN words ending in *H1 form the core of the Kra-Dai tone C:
|PAN(Sa)||Buyang (Li 1999)||PHlai(Os)||PTai(Pi)|
|‘to come, go’||*uwaH1||va11 < C2||—||—|
|‘head’||*quluH1||qa0 ðu11 < C2||*uRəu C||*kraw C|
|‘shoot, outgrowth, flower’||*buŋaH1||ma0 ŋa11 < C2||—||—|
PAN(Sa): Proto-Austronesian (Sagart, this post); PHlai(O): Proto-Hlai (Ostapirat 2004); PTai(Pi): Proto-Tai (Pittayaporn 2009)
Supporting evidence for these reconstructions:
*uwaH1 ‘to come, to go’: Atayal uah ‘come’, Mantauran Rukai oa ‘go’, Babuza m-oa ‘come’, Puyuma ua ‘go’;
*quluH1 ‘head’ : Paiwan qulu, Sediq (Taroko) qolox ‘skull’, Saisiyat ta-ʔœlœh, Aklanon úeo(h);
*buŋaH1 ‘shoot, outgrowth, flower’: Saisiyat poŋaeh ‘flower’ (p- unexplained; expect b-), Saaroa vuŋavuŋa ‘ear of foxtail’ (own fieldwork, 2014), Kanakanabu buŋabuŋa ‘flower’, Aklanon búːŋah ‘fruit’.
Some Kra-Dai C-category words cannot come from *H1. The word for ‘excrement’, Proto-Kra *kai C, Proto-Hlai *akaːi C, Proto-Tai *C̬.qɯj C, in all likelihood corresponds to a PAN word reconstructed as *C1aq3i (Tsuchida), Blust *Caqi (Blust), *taqí (Wolff). Under the generally accepted sound correspondences, these should yield sai in Pazeh and Kaxabu, two closely related languages of central-western Taiwan. If the word had ended in *-H1, saih would be expected in both. The attested forms are Pazeh saik, Kaxabu saix (Tun 2015). Recently, thanks to my friends Prof. Hsing Yue-ie and Hsu Tze-fu of the Institute of Microbial and Plant Biology, Academia Sinica, I was able to visit Mr Tun in Puli and to record his pronunciation of this word (here). Blust treats Pazeh saik as a metathesis, but that explanation cannot work for Kaxabu. Currently I do not know any other examples of the correspondence Pazeh –k to Kaxabu –x. One possibility is that the word ended in a rare consonantal ending PAN *-x, preserved unchanged in Kaxabu, and merged with *-k in Pazeh. The aberrant –l ending in Kavalan tal ‘excrement’ would be its indirect reflection, as would tone C in Kra-Dai. This is speculative, as no other example of the final-consonant correspondence shown by ‘excrement’ in Austronesian is currently known.