Decrepitude

from WordNet (r) 3.0 (2006)

decrepitude
    n 1: a state of deterioration due to old age or long use [syn:
         {decrepitude}, {dilapidation}]

from The Collaborative International Dictionary of English v.0.48

Decrepitude \De*crep"i*tude\, n. [Cf. F. d['e]cr['e]pitude.]
   The broken state produced by decay and the infirmities of
   age; infirm old age.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

21 Moby Thesaurus words for "decrepitude":
      caducity, debilitation, debility, decay, deterioration,
      dilapidation, disease, dotage, enervation, feebleness, incapacity,
      infirmity, malaise, old age, ruin, senescence, senility,
      sickliness, superannuation, unhealthiness, weakness

[email protected]