ricketiest

/ˈrɪkɪtiɪst/
adjective
  1. Most likely to fall or collapse because of weakness or poor condition; shakiest.
    • Of all the old sheds on the farm, that one is the ricketiest and should be torn down first.
    • We had to cross the ricketiest bridge I've ever seen, with planks missing and ropes frayed.
    • The ricketiest chair in the house was saved for guests no one liked.