decrepit

UK: dɪˈkrɛpɪt | US: dɪˈkrɛpɪt

Definition
  1. adj. worn out or broken down by age or use

  2. adj. feeble or infirm, especially from old age

Structure
de <down, away>crepit <rattle, crackle>de <down, away>crepit <rattle, crackle>
Etymology

Originally from Latin decrepitus, combining de- (down) and crepitus (a rattling sound), the word evoked the idea of something "broken down with a cracking sound," like old bones or machinery. Over time, it generalized to describe anything weakened by age or overuse.

Examples
  1. The decrepit old house groaned in the wind.

  2. His decrepit knees made climbing stairs painful.

  3. The museum displayed a decrepit manuscript from the 15th century.

  4. She refused to sell her decrepit car, claiming it had sentimental value.

  5. The bridge was deemed unsafe due to its decrepit condition.