unsusceptible

/ˌʌnsəˈsɛptəbəl/
adjective
  1. Not easily influenced, affected, or harmed by something.
    • The material is unsusceptible to rust.
    • He remained unsusceptible to the salesman's arguments.
    • Some people are unsusceptible to common colds.
Antonyms
What does "unsusceptible" mean? | whatsthatwordmean | whatsthatwordmean