From Longman Dictionary of Contemporary Englishundeterredun‧de‧terred /ˌʌndɪˈtɜːd $ -ˈtɜːrd/ adjective if you are undeterred by something, you do not allow it to stop you doing what you wantundeterred by Undeterred by his early failures, he decided to keep writing.
Examples from the Corpus
undeterred• But even those who'd heard the news seemed undeterred.• Haverford took a new sheet of paper and continued to compose, undeterred.• Once again, the supporters were undeterred by facts.• Sotheby's was undeterred by the knowledge that the picture had been offered around.• The cuckoo continued calling in the far recesses of the wood undeterred by the surrounding stillness.• Go for broke, and be undeterred in your search for the possible dream.undeterred by• Barkeley, undeterred by injury, continues to play. 