Decrepit (adjective)

1. In poor condition as a result of age or neglect.
2. Worn out or weakened by age or use.
3. Old and in bad condition.

Origin:

From latin decrepitus, past participle of decrepare, "to break dow.n"

Examples:

1. The house was decrepit and in need of extensive repairs.
2. The old man was stooped and decrepit, barely able to walk.
3. The bridge had become decrepit and was deemed unsafe for use.
4. The once grand hotel had become decrepit and run down.
5. The boat was so decrepit, it was a wonder it was still afloat.