When it is seen to have risen too far, the central banks of major countries cooperate to intervene.

I walked as far as the station.

He is by far the cleverest student in the class.

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

Kaoru, yours is the best reaction so far - you win the grand prize.

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

Khabarovsk is among the largest cities of the Russian Far East.