undeterred (adjective)

1. Despite facing numerous rejections, the aspiring author remained undeterred and continued to write.

2. Even after being rejected many times, he was undeterred in pursuing his love for her.

3. The comedian kept telling the same unfunny joke all night, undeterred by the lack of laughter from the audience.

4. The determined character in the cartoon was undeterred by the obstacles and always found a way to succeed.