"don't go beyond the farthermost (or furthermost) tree"
同义词：farthermostfarthestfurthestutmostuttermost
ADJ（形容词） The furthermost one of a number of similar things is the one that is the greatest distance away from a place. 最远的 [ADJ n]
We walked to the furthermost point and then sat on the sand dunes.
我们走到了最远点，然后坐在沙丘上。