Definition of formidable
- a formidable prospect
- a formidable opponent
- a formidable accomplishment
The mountains were a formidable barrier.
He has mastered a formidable amount of material.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'formidable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: 15th centurySee Words from the same year
arduous, Augean, backbreaking, challenging, demanding, difficult, effortful, exacting, 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;
What made you want to look up formidable? Please tell us where you read or heard it (including the quote, if possible).
an inn where caravans rest at night
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