From: alex
Message: 38156
Date: 2005-05-30
> 'Adverbial -i'! In monosyllables, final Latin -s yields -i, as inItalian has "due", "tre"; no final "i" there
> Italian, where the resulting final -i is known as 'adverbial -i'. The
> accusative masculine and feminine of Latin _duo_ are _duo:s_ and
> _dua:s_. The question here is then probably when _duo:s_ would have
> become a monosyllable. The regularisation of the nominal plural to
> *dui: is also not impossible - I don't remember whether Italian shows
> a similar development.
>
> The development Latin _tre:s_ > Romanian _trei_ presents no problems.
>
> Richard.