Pabappa wrote: ↑Sun Apr 19, 2020 4:50 pmThe fact that they dropped syllables gradually and irregularly from the table rather than, for example, just ditching whole rows all at once, suggests that it was never a perfect snapshot of the phonology of the language at the time of writing. Spelling lags pronunciation in many languages, perhaps a majority. If we assume that what was once /ə wə/ became /o wo/ and then both merged as /o~wo/ (an allophonic contrast, not phonemic), it seems reasonable to me to assume that the syllable we spell yo1 may have become identical with yo2 in pronunciation before it was dropped from the syllabary.
The gaps are perfectly phonetically reasonable though. Notice how the vowel pairs involving [j] (i1-i2, e1-e2) are missing the contrast after coronals and /w/ (the latter perhaps representing a merger of */wj/ with /jw/?), and the vowel pairs involving [w] (o1-o2) are missing after labials. Dropping [j] after a coronal (or palatal) and [w] after a labial are perfectly common sound changes.
This kind of thing is also attested elsewhere too. Most of North American English has dropped the /j/ of older /ju:/ after /t d/ and less often also /n/, producing the likes of "tune" /tʉn/ and "new" /nʉ/ (as opposed to SSBE /tju:n/ and /nju:/), but it is retained after most other consonants, as in "fume" /fjʉm/ or "cute" /kjʉt/. This is similar to the lack of [j] after /t d s z n r/ for Old Japanese /i e/.
Also, PIE as reconstructed didn't have much of /w/ as a glide inside an onset except after coronals (mostly s d dh, but also some t r) and laryngeals, plus a few cases after the so-called palatals (which as we know were probably velars). If you consider PIE kʷ gʷ gʷʰ as really "kw gw gʰw", the complete lack of /w/ after PIE /p bʰ/ is very similar to the lack of [w] after /p b/ for Old Japanese /o/.
Looking at what happened after onto Latin is relevant too (and also a bit fun). Proto-Italic remained much the same as PIE with regard to /w/ (minus the presence of laryngeals, which left bare instances of /w/), and further started treating the PIE labiovelars kʷ gʷ gʷʰ as the sequences /kw gw ɣw/. However, from Proto-Italic to Classical Latin, /w/ was eliminated after both coronals and dʰ ǵʰ > /f x/, when either type of consonant was followed by a short vowel:
- *dwis > bis
- *dwenos > bonus
- Old Latin dwellom > bellum
- *sweso:r > soror
- *swekrus > socrus
- *swenos > sonus
- *swepnos > somnus
- PIE *dʰworom > PI *fworom > forum
- PIE *dʰwo:r > (with unstressed shortening before sonorant) PI *fwor-a:-s > forās
- PIE *ǵʰweh
1ros > (with unstressed shortening before sonorant) PI *xweros > ferus
Exceptions: PI *quattwōr is a bit interesting because Latin just syllabified the -w- after -tt-: quattuor [ˈkwat.tu.ɔr]. (This also a common strategy to get rid of Cj: PI *spekjo: > speciō [ˈspɛ.ki.o:], that is, when it doesn't just drop the -j-, as in hesternus 'yesterday', or only leave the -j-, as in *pedjo:sem > peiōrem [ˈpɛjjo:rɛm].) Proto-Italic had already lost the [w] in *sweḱs because of *septm, otherwise we'd get Latin *sox for 'six'.
Otherwise, the /w/ is maintained when /sw/ is followed by a long vowel, or when it's after a Proto-Italic velar plosive. The latter includes the fortition of /ɣw/ to /gw/ after /n/ (otherwise /ɣw/ just becomes /w/: *ɣwenjo > veniō, *leɣwis > levis). (Apparently there are no descendants of /dw/ followed by a long vowel. Proto-Italic *dweiros > dīrus is likely a borrowing from Umbrian, but it would've given us unattested Latin *duīrus /ˈdwi:rʊs/ [ˈdɥi:rʊs].)
- *swa:dwis > suāvis [ˈswa:.wɪs]
- *swa:dtos > *swa:ssos > suāsus [ˈswa:sʊs]
- *swe:sko: > suēscō [ˈswe:.sko:]
- *linkwo: > linquō [ˈlɪŋ.kwo:]
- *linkwa:m > linquam [ˈlɪŋ.kwam]
- *kwa:lis > quālis [ˈkwa:.lɪs]
- *dngwa: > Old Latin dingua > lingua [ˈlɪŋ.gwa]
- *ekwo:i > equō [ˈɛ.kwo:]
- *ekwos > Old Latin equos [ˈe.kwos]
- *kwid > quid [kɥɪd] (with /Cw/ [Cɥ] allophone due to following front vowel)
- *kwie:ts > quiēs [ˈkɥi.e:s]
- *kwenkwe > quinque [ˈkɥɪŋ.kɥɛ]
- *sninɣwet > ninguit [ˈnɪŋ.gɥɪt]
- *ongwen > unguen [ˈʊŋ.gɥɛn]
Exceptions: PI *kwelō > colō. Interestingly, collum is probably not an exception, coming from *kolsom (< western IE *kolsom < *kʷol-es-om with mysterious but old derounding) or *kollom (< kokʷlom < kʷekʷlo(s)-m with dissimilation, shared with Baltic meaning 'neck').
So, basically, /w/ was lost everywhere except after the velars /k g/,
except for a few words where a long vowel made it easier to say [sw] phonetically. And this is how Latin ended up with /kw gw sw/ as the only acceptable C + glide clusters (sometimes called /kʷ gʷ sʷ/).
Pabappa wrote: ↑Sun Apr 19, 2020 4:50 pmYes, i accept that /ɥ/ exists, but for the purposes of creating conlangs, I am going with my theory rather than setting up a language that has a /ɥ/ phoneme that only occurs in one specific environment, and indeed, in only one syllable in the whole language.
What I tried to convey last time when this topic came up was that phonological /jw/ shows up as [ɥ] at the surface. You see that a lot in diachronic Chinese, where /j/ is the initial and /w/ is the glide of the CGVC syllable structure, but that doesn't need to mean /ɥ/ is a separate phoneme that only appears in a very limited context.