liniment
noun [ U ] old-fashioned uk/ˈlɪn.ə.mənt/ us/ˈlɪn.ə.mənt/
（指通常含有酒精、用来缓解关节疼痛或使关节软化的）搽剂，镇痛油
a liquid, usually containing alcohol, that is rubbed into the skin to reduce pain or stiffness in a joint (= place where two bones are connected)
Synonym: embrocation