山长水远

山長水遠
shānchángshuǐyuǎn
(idiom) long and arduous journey

CEDICT

long and difficult journey

Wiktionary

形容路途艰辛遥远。宋．晏殊〈踏莎行．碧海无波〉词：「当时轻别意中人，山长水远知何处。」元．关汉卿《谢天香．楔子》：「最苦偏高离恨天，双泪落尊前，山长水远，愁见理行轩。」也作「山遥水远」。

重編國語辭典

Entry Composition

1 山 shān (coll.) small bundle of straw for silkworms to spin cocoons on

classifier: 座
2 长水 Chángshuǐ
  1. (～鎮, formerly ～鄉) Changshui (a town in Luoning, Luoyang, Henan, China, formerly a township)
  2. Changshui (a town in Luoning, Luoyang, Henan, China, formerly a township)
3 远 yuǎn
  1. far
  2. distant
  3. remote
  4. (intensifier in a comparison) by far
  5. much (lower etc)