So long and Thus far

So long noun - A farewell remark.

Thus far and so long are semantically related. In some cases you can use "Thus far" instead an adverb phrase "So long".

Thus far adverb - Used in negative statement to describe a situation that has existed up to this point or up to the present time.

So long and thus far are semantically related. Sometimes you can use "So long" instead an adverb phrase "Thus far".