Re: *dak^ru - *h2ak^ru

> *h2ak^ru- and *dak^ru- are identical except for the onset

> so you have ONE example
> of a word with or without an initial *d-. I don't agree this is evidence
> for a suffix. English has a non-etymological /n-/ in <newt> (~ <eft>)
> and <nickname> and LACKS an expected /n/ in <apron> and <adder>, but
> this is not sufficient evidence for positing an n-prefix in English

So maybe
feminine *seh2 ak^ru- was reanalysed as
masculine *so h2ak^ru-; and
neuter *tod ak^ru- was reanalysed as
masculine *so dak^ru- :-)

P.A.