bradrn wrote: ↑Mon Jul 08, 2019 3:11 amI’m aware of those possibilities already. I suppose the question I
really meant to ask was: can the glottal stop, without combining with anything else, change into a phoneme other than /ʔ/? (Sorry for being imprecise in the first place though.)
I honestly don't think so.
You can probably convert it into a [j] or [w] or [ŋ] by proxy though, by dropping it from syllable-initial position and then installing a rule that says syllables must start with a consonant. I think this is basically what happened in Cantonese at some point in its history, since in its early and mid-20th century form (when it started to be more carefully described) syllables that previously probably started with [ʔ] on the surface followed by a vowel now started with /j w ŋ/, i.e. /i/ now was /ji/, /y/ was /jy/ [ɥy] and /u/ was /wu/ [wuː] or /ŋu/ [ŋʊ]. (Words could begin with /o/ [ʔɔː] or /a/ [ʔa:] though.)
I’m not quite sure what to do now… Whimemsz has already said almost exactly the opposite. I think I’ll wait for now until a couple more people reply with their opinions.
Personally I have a hunch that sound change might be okay.
For what it's worth, Arabic tends to do some vowel coalescence when /w j/ are surrounded by short vowels, while generally maintaining /w j/ if one of the vowels is long. This shows that semivowel-dropping and subsequent vowel coalescence can be sensitive to the surrounding vowels; you don't have to drop all intervocalic /w j/ to make this kind of thing happen. Arabic doesn't only do it for identical vowels, but I think that might be okay in your conlang.
Examples of vowel coalescence: *zawara > zaara 'he visited', *zuwira > ziira 'he was visited', *daaʕiwun > daaʕin 'caller', *banaya > banaa 'he built', *baaniyun > baanin 'builder', *yansayu > yansaa 'he forgets', *buyiʕa > biiʕa 'it was sold' (but buniya 'it was built', *duʕiwa > duʕiya 'he was called'). Note also that "awa" and "awi" are allowed in the result of the more complex *munTawiyun > munTawin 'introverted', *munTawayan > munTawan 'enclosed, folded in'.
Examples of /w j/ maintenance: Haawala 'he tried', axawaatun 'sisters', musaawaatun 'equality', tanaawubun 'alternation', mutanaawibun 'alternating (adj.)', futuuwatun 'youth', numuuwun 'growth (nominative)', numuuwin 'growth (genitive)', ʕanaawiinu 'titles', zawaayaa 'corners', šatawiiyun 'of the winter', uurubbiiyuuna 'Europeans', as-siyaasiiyu 'the politician (nominative)', as-siyaasiiyi 'the politician (genitive)', tazaayudun 'increase (noun)', mutazaayidun 'increasing (adj.)'.