| Date: | 1500-1600 |
| Language: | Latin |
| Origin: | arduus 'high, steep, difficult' |
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ar‧du‧ous

—arduously adverb
WORD FOCUS: difficult 
difficult to do: hard, tough, challenging, daunting
difficult and needing a lot of physical effort: tough, strenuous, back-breaking, gruelling, arduous, punishing
difficult to deal with or talk about: tricky, awkward, delicate, sensitive, touchy
words for describing a difficult person: awkward, trying
words for describing difficult conditions: adverse, hostile
➔ See also difficult
