farther

Từ điển Oxford Advanced Learner 8th

far·ther [farther] adverb, adjective BrE [ˈfɑːðə(r)] NAmE [ˈfɑːrðər]
adverb (comparative of far)
at or to a greater distance in space or time
•farther north/south
•farther along the road
• I can't go any farther.
• As a family we grew farther and farther apart.
•We watched their ship moving gradually farther away.
•How much farther is it?
•They hadn't got any farther with the work (= they had made no progress).
see far/farther/further afield at ↑afield

Which Word?:
farther / further / farthest / furthest
These are the comparative and superlative forms of far.
To talk about distance, use either farther, farthest or further, furthest. In BrE, further, furthest are the most common forms and in NAmE, further and farthest: ▪ I have to travel further/farther to work now.
To talk about the degree or extent of something, further/furthest are usually preferred: ▪ Let’s consider this point further.
Further, but not farther, can also mean ‘more’ or ‘additional’: ▪ Are there any further questions? This sounds very formal in NAmE.
 
adjective (comparative of far)
at a greater distance in space, direction or time
•the farther shore of the lake