Synonyms for


Similarity of adj arduous

3 senses of arduous

Sense 1:
arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome
effortful (vs. effortless)
Sense 2:
arduous, straining, strenuous
effortful (vs. effortless)
Sense 3:
arduous
difficult (vs. easy), hard
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