Meaning & use
arduous
Requiring great effort, energy, or endurance; extremely difficult and exhausting to complete.
See it in a sentence
Climbing the mountain in a single day proved to be an arduous challenge.
The refugees endured an arduous journey across the desert with little water.
A note on using this word
Arduous emphasizes sustained physical or mental effort over time, more than difficult, which can describe a single tricky moment.
Words with a similar meaning
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