-i:r-/-u:r- after labiovelars in Sanskrit?

On Pet, svibanj 26, 2006 11:59 am, Piotr Gasiorowski reče:

> On 2006-05-26 11:17, Mate Kapović wrote:
>
>> How would you then explain for instance IE *gWlh1tós (Greek ble:tós) >
>> Skr
>> ud-gu:rn.ás "risen"? The influence of ud-?
>
> No, /u/ predominates after velars if the influence of the context isn't
> strong, but in order to prove that the u-colouring is due to a
> labiovelar you'd have to show that
>
> (a) *kr.hV > kirV, *kr.hC > ki:rC
> (b) *kWr.hV > kurV, *kWr.hC > ku:rC
>
> etc., AND NOT THE OTHER WAY OUT with at least statistically significant
> consistency. Individual examples chosen to illustrate the change don't
> carry much weight as long as you ignore the counterexamples. There is
> some variation even after palatals, cf. RV ju:rn.á- vs. AV ji:rn.á- <
> *g^r.h2-nó- 'worn out with age'.

Please not that I'm not advocating the supposed changed, I'm just keeping
my options open.
The reflection -u:r- is otherwise found after a labial (cf. ú:rn.a:,
pu:r-, pu:rn.ás etc.). I don't have the literature handy, but is there any
fluctuation here? I mean, are there cases like -i:r- after normal labials?

Mate