de·crep·it /dɪˈkrɛpət/
  (a.)衰老的
  De·crep·it a.  Broken down with age; wasted and enfeebled by the infirmities of old age; feeble; worn out. “Beggary or decrepit age.”
     Already decrepit with premature old age.   --Motley.
  Note: ☞ Sometimes incorrectly written decrepid.
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  decrepit
       adj 1: worn and broken down by hard use; "a creaky shack"; "a
              decrepit bus...its seats held together with friction
              tape"; "a flea-bitten sofa"; "a run-down
              neighborhood"; "a woebegone old shack" [syn: creaky,
               flea-bitten, run-down, woebegone]
       2: lacking physical strength or vitality; "a feeble old woman";
          "her body looked sapless" [syn: debile, feeble, infirm,
           sapless, weak, weakly]