So far as I know, there is no such word.

That's not likely in so far as I can see.

In so far as I understand, he will be attending the meeting.

In so far as I understand, he will be attending the meeting.

So far as I know, he is the best candidate for the job.

He is superior to the rest in so far as he can speak English.

He would even go so far as to sacrifice his own life for his country.

I would go so far as to say that she is the most talented person I know.

I can't believe he would go so far as to steal from his own family.

You are in the right so far.