rickety

adjective3

1. •
   Of an object: not strong or sturdy, as because of poor construction or upkeep; not safe or secure.

   • He hesitated about climbing such a small, rickety ladder.
2. •
   Feeble in the joints; tottering.

   • The rickety old man hardly managed to climb the stairs.
3. •
   Affected with or suffering from rickets; rachitic.