Arduous
English Meaning
Steep and lofty, in a literal sense; hard to climb.
- Demanding great effort or labor; difficult: "the arduous work of preparing a Dictionary of the English Language” ( Thomas Macaulay).
- Testing severely the powers of endurance; strenuous: a long, arduous, and exhausting war.
- Hard to traverse, climb, or surmount. See Synonyms at burdensome, hard.