arduous
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Synonyms, Thesaurus & Antonyms of 'arduous' Princeton's WordNet
1. (adj) arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome
characterized by effort to the point of exhaustion; especially physical effort Synonyms: backbreaking , sullen , ponderous , laborious , overweight , toilsome , intemperate , sound , wakeless , dense , grueling , with child(p) , threatening , grave , straining , severe , cloggy , lumbering , large(p) , great(p) , clayey , enceinte , voiceless , grievous , tough , fleshy , weighed down , hard , weighty , unvoiced , gruelling , expectant , concentrated , lowering , surd , heavy(a) , sonorous , impenetrable , arduous , operose , strenuous , heavy , heavy(p) , big(a) , labored , profound , difficult , laboured , punishing , strong , gravid , big(p) , leaden , knockout Antonyms: effortless , easy
2. (adj) arduous, straining, strenuous
taxing to the utmost; testing powers of endurance Synonyms: toilsome , heavy , strenuous , laborious , punishing , hard , operose , arduous , grueling , backbreaking , straining , gruelling Antonyms: effortless , easy
3. (adj) arduous
difficult to accomplish; demanding considerable mental effort and skill Synonyms: toilsome , heavy , strenuous , laborious , punishing , hard , operose , grueling , backbreaking , straining , gruelling Antonyms: easy , effortless
Synonyms, Thesaurus & Antonyms of 'arduous' English Synonyms and Antonyms
1. arduous
Arduous (L. arduus, steep) signifies primarily so steep and lofty as to be difficult of ascent, and hence applies to that which involves great and sustained exertion and ordinarily for a lofty ai Synonyms: difficult , arduous , hard , onerous , toilsome , exhausting , laborious , severe , trying Antonyms: easy , facile , light , pleasant , slight , trifling , trivial
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Synonyms for arduous 
