persister

/pərˈsɪstər/
noun
  1. A person who continues doing something despite difficulties or opposition.
    • She was a persister, applying to dozens of jobs before finally getting an offer.
    • As a persister, he kept training every day even when he felt like quitting.
    • The young inventor was a persister who never gave up after failed experiments.
  2. A thing that continues to exist or function for a long time.
    • In the computer system, the file acted as a persister, remaining on the hard drive after multiple restarts.
    • The old oak tree was a persister, standing for centuries through storms and droughts.
    • This type of bacteria is a known persister, surviving even after antibiotic treatment.
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