This post continues a previous one on the ST word for ‘excrement’ (here) as represented in the STEDT database.
The STEDT set #601 PTB *m/s-tu:k SPIT (here) is another example of a STEDT etymon conflating two phonetically and semantically similar cognate sets. One has vowel *u (column I in the below table), the other has *a (column II). The form with *u is reflected in e.g. Lushai thuk ‘to spit’, Lepcha tyuk id. Dulong duʔ⁵⁵ ‘vomit’; the etymon with *a by Lushai chhâk ‘to spit’, Atong dak id., Tangkhul (khā) tok ‘mucus’; perhaps also by Nocte a tʰoak ‘to spit’, Chang Naga tok id.
Some Lushai etyma with initial chh- [tsh-] reflect an earlier root initial *t- in a specific condition, perhaps when prefixed with *s- (compare the STEDT reconstructions PTB *s-twak ‘go out’, *s-tu ‘vagina’, Lushai chhuak, chhu). Lushai chh- also corresponds to Old Chinese *t- in chhûng ‘the inside of anything’, OC 中 trjuwng < *truŋ ‘center’.
Thus Lushai chhâk ‘to spit’ is likely from *[s-]ta:k, rather than from the first etymon. That word had earlier been made part of set #601: but it is now (June 2019) placed under #540 PTB *k(r)aːk phlegm / sputum / mucus. On the one hand that decision solves a problem with the vowel correspondence, since Lushai -âk could not plausibly reflect an earlier *-u(:)k; at the same time making chhâk a reflex of *k(r)a:k is phonologically unlikely because (1) that etymon is already present in Lushai, as khâk ‘phlegm’, and (2) there are no good parallels for Lushai chh– having evolved out of an earlier *kr-.
There is no clear semantic difference between the two sets. In Lushai, where both occur, the semantic difference appears to relate to the amount of saliva being spat out. The following glosses are extracted from Lorrain’s 1940 dictionary:
2) thuk (p. 488) thuk, v. to spit, to expectorate; to spit out, to spit at, to spit on or upon. (Unless an intensive adverb is used with this word it generally signifies spitting a very small quantity of saliva.)
The second set is in all likelihood cognate with the Chinese word for ‘spit’: 吐 thuX/H < *tʰˤaʔ, *tʰˤaʔ-s. Sagart (2017) shows that one source of OC *-ʔ is PST *-q, which merges with *-k outside of Sinitic.
We are thus able to posit a PST monosyllabic etymon #tʰaq ‘to spit’. That etymon in turn can be compared with PAN *untaq ‘to spit’ (Sagart 2005). The comparative picture is shown below:
|Tangkhul||(khā) tok ‘mucus’|
|Old Chinese||吐 *tʰˤaʔ ‘to spit’|
|Proto-Austronesian||*untaq ‘to spit’|
Table 1: two etyma within the STEDT set #601 PTB *m/s-tu:k SPIT, with Chinese and Austronesian cognates.
Lorrain, J. Herbert (1940) Dictionary of the Lushai language. Calcutta : Asiatic Society.
Sagart, L. (2005) Sino-Tibetan-Austronesian: an updated and improved argument. In L. Sagart, R. Blench and A. Sanchez-Mazas (eds) The peopling of East Asia: Putting together Archaeology, Linguistics and Genetics, pp. 161-176. London: RoutledgeCurzon.
Sagart, Laurent (2017). A candidate for a Tibeto-Burman innovation. Cahiers de Linguistique Asie Orientale 46, 101-119.