*G^EN-

[petegray]

> *g^enH1- would constitute an exception to the general proposition that IE
> roots have the form CVC-.  Every good "rule" needs an exception or two.

There are many exceptions of this kind, Pat.  Are you being, perhaps, a
little disingenuous?   Just for the pattern Ce(/R)TH (T= stop), one can
suggest:
  *keubH2   lie down, lay down
  *sekH        cut
  *wedhH1   hit
  *wetH2      say
  *krepH      creep
The pattern of g'enH,  CeRH, is even commoner.

Peter