Meaning

noun a person who is immune to a particular infection

adjective relating to the condition of immunity

adjective secure against

originEtymology tree Proto-Indo-European *mey- Proto-Indo-European *moy-nósder. Proto-Italic *moinos Latin mūnus Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Latin -is Latin in- -is Latin immūnisder. Middle French immunbor. Middle English English immune From Middle English, from Middle French immun, from Latin immūnis (“exempt from public service”), from in- (“not”) +…

Etymology from Wiktionary, CC BY-SA 3.0