arthritis
noun [ U ] uk/ɑːˈθraɪ.tɪs/ us/ɑːrˈθraɪ.t̬əs/
关节炎
a serious condition in which a person's joints (= the places where two bones are connected) become painful, swollen, and stiff
In later life she was crippled with arthritis. 晚年她因患关节炎而行动不便。