Arduous: meaning, example and synonyms
Arduousadj. Requiring great effort and persistence; difficult and tiring, especially over a long period.

Example
Mapping the river's entire course proved arduous: the survey team spent three summers hauling equipment through dense, roadless forest.
- Part of speech
- adjective
- Synonyms
- strenuous, grueling, taxing, laborious
- Antonyms
- effortless, easy, undemanding, painless
- Memory tip
- Arduous sounds like "hard-uous": hard work that drags on.
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Check yourself: Arduous in context
Restoring the mural proved ______: conservators spent four years removing grime with cotton swabs no larger than a fingertip.
Answer: arduous. Four years of slow, painstaking work describe a task that demands great effort and persistence. Spurious (false), dogmatic (rigidly opinionated) and counterfactual (about what didn't happen) don't describe a demanding task.
Early settlers described the mountain crossing as ______, noting in their journals that the wagons often advanced less than a mile a day over the rocky passes.
Answer: arduous. Wagons crawling less than a mile a day over rocky passes signal an exhausting, effortful journey. Nothing in the passage suggests the crossing was unimportant, dishonest or shapeless.