farther

To or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense).

“the application of the law was extended farther”

“he is going no farther in his studies”

To or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense).

“farther north”

“moved farther away”

More distant in especially degree.

“farther from the truth”

“farther from our expectations”

More distant in especially space or time.

“they live in the farther house”