Dear Grisha,
welcome.
I do not know much about prepositions, I am not qualified, but what comes
to my mind is: saha+gata, these are together, meaning, accompanied by. A
citta is upekkhaa sahagata.m, or somanassa sahagata.m.
There are many compounds ending with gata. It is a qualifier.
Sadhi.m cannot be used in that way. Someone goes together with someone else,
then saddhi.m is used.
Nina.
op 04-12-2005 06:41 schreef asoka_23 op asoka_23@...:

> I was wondering if someone could answer a question. Is
> there a difference between the prepositions "saha" and
> "sadhi.m" (both translate as "with")? are there particular
> reasons to use one instead of another in certain cases?