免疫 miǎnyì immunity (to disease)
How to remember 免疫: 免 avoid + 疫 epidemic = immunity (to disease).
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How it is used
- Immunity to disease - 免疫力 (miǎnyìlì) immune strength; 免疫系统 (miǎnyì xìtǒng) immune system.
- Used figuratively too: 对批评免疫 (duì pīpíng miǎnyì) immune to criticism, i.e. unaffected by it.
- The 免 (spare/exempt) captures the sense: the body is 'spared' the disease.