run-down

adjectives

worn and broken down by hard use
"a creaky shack"; "a decrepit bus...its seats held together with friction tape"; "a flea-bitten sofa"; "a run-down neighborhood"; "a woebegone old shack"
creaky, decrepit, derelict, flea-bitten, run-down, woebegone
having the spring unwound
"a run-down watch"
run-down
is similar to
not performing or able to perform its regular function
"a malfunctioning valve"
malfunctioning, nonfunctional