Definition of formidable
1
: causing fear, dread, or apprehension
a formidable prospect
2
: having qualities that discourage approach or attack
a formidable opponent
3
: tending to inspire awe or wonder : impressive
a formidable accomplishment
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Merriam-Webster unabridged
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Time Traveler for formidable
The first known use of formidable was in the 15th century
See more words from the same century