insusceptible

/ˌɪnsəˈsɛptəbəl/

If you're insusceptible to something, you're unlikely to be harmed or affected by it. The comic book hero Superman is famously insusceptible to everything except for Kryptonite; it's the only substance to which he's vulnerable.

If you've had the chicken pox vaccine, you'll be insusceptible to the chicken pox virus, and if you aren't interested in music, you're probablykrypto insusceptible to a particularly poignant, bittersweet melody that makes your friend cry. Kids who are insusceptible to TV commercials don't pay any attention to them (and don't beg their parents for the latest toys).

Definitions of insusceptible

1. adjective

   not susceptible to
   synonyms: unsusceptible

   insensitive

   not responsive to physical stimuli

   immune, resistant

   relating to or conferring immunity (to disease or infection)

   immunised, immunized, vaccinated

   having been rendered unsusceptible to a disease

   immunogenic

   possessing the ability to elicit an immune response

   incapable

   not being susceptible to or admitting of something (usually followed by `of')

   unpersuadable, unsuasible

   not susceptible to persuasion

   unresponsive

   not susceptible to suggestion or influence