I cannot let it go unchallenged.
Source: tatoeba (42117)
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9 total sentences available.
I cannot let it go unchallenged.
Source: tatoeba (42117)
Japan's competitiveness in camera making is unchallenged.
Source: tatoeba (63548)
But I could not rest, Watson, I could not sit quiet in my chair, if I thought that such a man as Professor Moriarty were walking the streets of London unchallenged.
Source: tatoeba (7416446)
Unchallenged faith in books is worse than illiteracy.
Source: tatoeba (10177240)
Showing 4 of 9 available sentences.
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.