Definition of arduous
- … a life of arduous toil.
- —A. C. Cole
- an arduous path
He went through a long and arduous training program.
an arduous journey across miles of desert
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'arduous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: 1718See Words from the same year
Augean, backbreaking, challenging, demanding, difficult, effortful, exacting, formidable, grueling (or gruelling), hard, heavy, herculean, killer, laborious, moiling, murderous, rigorous, rough, rugged, severe, stiff, strenuous, sweaty, tall, testing, toilsome, tough, uphill;
abstract, abstruse, complex, complicated, elusive, hairy, insoluble, intricate, involved, knotty, opaque, problematic (also problematical), recondite, serious, spiny, stubborn, thorny, ticklish, tricky;
: very difficult
What made you want to look up arduous? Please tell us where you read or heard it (including the quote, if possible).
without deliberation, pause, or delay
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