③
免疫的(免于疾病的,1881 起)
相关 形容词理据由「免于义务」移到「免于疾病」——同一「不受其害」结构落到医学对象(1881 由 immunity 逆构)。
例句
Most children are immune to measles after vaccination.接种疫苗后,大多数孩子对麻疹有了免疫力;由免除转到免于疾病(相关·分类)——免疫。Once you have had the disease, you are immune.得过这种病之后你就免疫了;同此。
溯源路径本义 → 义项3