The term 'as far as' is a phrase used to indicate the limit of something. It can be used in a variety of contexts, such as when discussing the extent of a person's knowledge or the boundaries of a particular situation. The two crossword solutions for this phrase are 'UNTIL' and 'upto'. 'UNTIL' is a preposition that indicates a point in time or a situation that will remain in effect UNTIL a certain point. 'Upto' is an adverb that indicates a limit or boundary that something will not exceed. Together, these two words can be used to express the idea of 'as far as'.