painkiller
noun [ C ] uk/ˈpeɪnˌkɪl.ər/ us/ˈpeɪnˌkɪl.ɚ/
止痛药
a drug that is used to reduce or remove physical pain
The body produces chemicals that are natural painkillers. 人体会产生一些化学物质,它们是天然的止痛剂。
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