say it: uhn-di-TURD
undeterred is an adjective meaning "not deterred". It carries one recorded sense.
not deterred
“pursued his own path...undeterred by lack of popular appreciation and understanding”
Definitions, synonyms and semantic relations for undeterred come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.