furthest

/ˈfɜrðɪst/
adjective
  1. At the greatest distance in space or time; most distant.
    • They traveled to the furthest village in the valley.
    • The furthest planet in our solar system is Neptune.
    • That is the furthest date we can extend the deadline.
Synonyms
adverb
  1. To the greatest distance or extent; most far.
    • Of all the explorers, she ventured furthest into the jungle.
    • His ideas went furthest in challenging traditional views.
    • Who can throw the ball the furthest?