Definition of undeterred
: not discouraged or prevented from acting : not deterred
a politician undeterred by criticism So far, Dallas, San Antonio and El Paso have rejected his offer … But Pickens, ever the wheeler-dealer, is undeterred.— Karen Breslau
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Merriam-Webster unabridged
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Time Traveler for undeterred
The first known use of undeterred was in 1607
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