infirmity       
noun [ C or U ]  formal uk/ɪnˈfɜː.mə.ti/ us/ɪnˈfɝː.mə.t̬i/
 (尤指因年迈而长期)病弱的,需要照顾的
illness, especially for long periods or because of old age
  an advanced state of infirmity 极度衰弱 
 She suffered from a long list of infirmities. 她身患多种疾病。 
 Synonyms: debility frailtyweakness