faulty
adjective
[ ˈfɔːlti ]
• not working or made correctly; having defects.
• "a faulty brake"
Similar:
malfunctioning,
broken,
damaged,
defective,
not working,
not functioning,
in disrepair,
out of order,
out of commission,
inoperative,
unsound,
unusable,
useless,
on the blink,
on its last legs,
kaput,
bust,
busted,
conked out,
acting/playing up,
gone haywire,
gone phut,
done for,
wonky,
dud,
knackered,
duff,
on the fritz,