From: Glen Gordon
>This *r. is based on Greek ?a, ?, r?(Cypr. ?(a)) "therefore, so, that is toPerhaps this is the source of the *-r in the mediopassive...
>say", ?ra (interr. particle, < ??a) and Lithuanian ir^ "and, also" (< *r.),
>ar^ "(interr. particle)" (< *or). No other cognates seem to exist.