immune

 
Pronunciation: /ɪˈmjuːn/

adjective

  • 1resistant to a particular infection or toxin owing to the presence of specific antibodies or sensitized white blood cells: they were naturally immune to hepatitis B
  • [attributive] Biology relating to immune resistance.
  • 2protected or exempt, especially from an obligation or the effects of something: they are immune from legal action
  • [predic.] not affected or influenced by something: no one is immune to his immense charm

Origin:

late Middle English (in the sense 'free from (a liability')): from Latin immunis 'exempt from public service or charge', from in- 'not' + munis 'ready for service'. Senses relating to physiological resistance date from the late 19th century