The discussion here is about *ka, *k^a etc. in PIE. But who said they were
really present?
Please consult the Lubotsky's article "Against a Proto-Indo-European phoneme
*a", available on
https://openaccess.leidenuniv.nl/handle/1887/2662. Of
course, if no *a's were present in PIE, all the discussion on uvular or
pharyngeal character of *k/*g/*gh is just groundless.
Of the previously mentioned by me, Lubotsky gives the following
reconstructions: *bheH2g^- for bhajati / phagein, *k^eH2d- for cadere/çad-,
*g^heH2n-s- ~ *g^hH2n-s- for goose.
Grzegorz J.
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