immune: [15] The -mune of immune is the same as that of remunerate and of commune (and hence of common). It represents Latin mūnis ‘ready to give service’. The addition of the negative prefix in- gave immūnis, which in classical Latin denoted literally ‘exempt from a service, charge, etc’, and hence by metaphorical extension ‘free from something, devoid of something’. This general sense still survives, of course, in English (as in ‘grant immunity from prosecution’); and the more specific ‘not liable to infection’ did not emerge until as recently as the 1870s, probably under the influence of French or German. => common, commune, remunerate
immune (adj.)
mid-15c., "free; exempt," back-formation from immunity. Latin immunis meant "exempt from public service, free from taxes." Specific modern medical sense of "exempt from a disease" (typically because of inoculation) is from 1881. Immune system attested by 1917.
中文解释
1、im- "not, opposite of" => "这里引申为：free from, exempt from" + mun- + -e.2、字面含义：free from or exempt from public service or duty, exempt from service or obligation. 也就是不用做公共服务，免除了公共服务。3、按咱们古代的说法：就是不用服劳役。由此引申为：豁免、免除、免疫。
实用例句
1. This discovery led on to studies of the immune system.
此发现使人们开始对免疫系统进行研究。
来自柯林斯例句
2. Members of the Bundestag are immune from prosecution for corruption.
德国联邦议院的成员可免受贪腐罪的起诉。
来自柯林斯例句
3. Yoga can be used to strengthen the immune system.
瑜伽能增强人体免疫系统。
来自柯林斯例句
4. The immune system is our main defence against disease.