arduous: [16] Latin arduus, the source of English arduous, originally meant ‘high, steep’ (it is related to Greek orthós ‘straight, upright, correct’, as in English orthodox); the sense ‘difficult, laborious’ was a later metaphorical development. (The word has no connection with ardour, which comes ultimately from Latin ardēre ‘burn’; see ARSON.) => orthodox
arduous (adj.)
1530s, "hard to accomplish, difficult to do," from Latin arduus "high, steep," also figuratively, "difficult," from PIE root *eredh- "to grow, high" (see ortho-). Literal sense of "high, steep, difficult to climb," attested in English from 1709.
实用例句
1. an arduous journey across the Andes
翻越安第斯山脉的艰苦之行
来自《权威词典》
2. Take your ease, for the journey ahead will be long and arduous.
好好休息一下, 前面的路程远而艰难呢.
来自《简明英汉词典》
3. The refugees made an arduous journey through the mountains.
难民们艰难地越过高山.
来自《简明英汉词典》
4. The task is arduous; besides , there's not much time.
