Dictionary - English
arduous
- Demanding great effort or labor; difficult: "the arduous work of preparing a Dictionary of the English Language” ( Thomas Macaulay). from The American Heritage® Dictionary of the English Language, 4th Edition
- Testing severely the powers of endurance; strenuous: a long, arduous, and exhausting war. from The American Heritage® Dictionary of the English Language, 4th Edition / listen
- Hard to traverse, climb, or surmount. See Synonyms at burdensome, hard. from The American Heritage® Dictionary of the English Language, 4th Edition / listen
