> The words ṟēvu (ఱేవు), ṟēvaḍu (ఱేవడు), ṟēvadi (ఱేవది) etc. are not derived from 'iravu' (<ir-) (note the alveolar trill, instead of tap). They are related to [DEDR 516] *iṯ-/iṟ- 'to descend', 'to go beyond' iṟaṅku (iṟaṅki-) to descend, alight, fall (as rain), disembark; iṟaṅkal place of descent, of debarkation etc.
The usages of రేవు rēvu are more with ర్ than with ఱ్ . Is not "*iṯ-/iṟ- 'to descend', 'to go beyond' iṟaṅku (iṟaṅki-) to descend, alight, fall (as rain), disembark; iṟaṅkal place of descent, of debarkation etc."
all from the tracing to Tamil ? Do we have *iṯ-/iṟ- 'to descend', 'to go beyond' iṟaṅku (iṟaṅki-) to descend, alight, fall (as rain), disembark; iṟaṅkal place of descent, of debarkation etc in Telugu? ( రేవడి rēvaḍi is as in renṭiki ceḍḍa rēvaḍi )
> But Dravidian linguists have been wrongly reconstructing words and features found only in South Dravidian (esp. Tamil) to the parent language under the assumption that Tamil represents the archaic form of Dravidian.
------ I thought each reconstructions were done meticulously case by case choosing the most plausible root of phonetic change from among those required to account for all the available forms. I thought, otherwise, identifying any non-Tamil language as retaining the Protodravidian features/elements would not have been possible. But if it can be proved that 'Dravidian linguists have been wrongly reconstructing words and features found only in South Dravidian (esp. Tamil) to the parent language under the assumption that Tamil represents the archaic form of Dravidian'
, it will be a path-breaking critique of the current methods of historical linguistics. Now that the likes of Prof. Hans Henrich Hock
started to extend the argument to IE studies too, it may pave way for a revamp of the existing methods of historical linguistics. Any such change is certainly welcome.
> I believe there is an urgent need to reevaluate the Dravidian languages considering the possibility of pre-Dravidian substrata in various branches of the Dravidian languages.
----- I think you are aware that such proposals are as old as the beginnings of Dravidian linguistics, though no systematic study ever took off. With you there seems to be promise of such a work in near future.
> Suspending the belief that Tamil represents the most archaic form of Dravidian would be a starting point in this endeavour.
------ I agree that cleaning the slate and starting out from the scratch is required. But I don't think pre-Dravidian substrata issue need not be based on the Tamil issue. Des'ya components of various members of Dravidian family that can not be explained by the Dravidian model are what lead to pre-Dravidian substrata.
Best wishes,
Nagaraj