unserviceable

/ˌʌnˈsɜrvɪsəbəl/
adjective
  1. Not in working condition; not able to be used or repaired for its intended purpose.
    • The old truck was declared unserviceable after the engine seized.
    • The army grounded the helicopter because it was unserviceable.
    • All unserviceable equipment must be tagged and removed from the workshop.
  2. Not suitable or fit for use; impractical or ineffective.
    • The bridge was deemed unserviceable for heavy traffic.
    • The unserviceable design of the app made it frustrating to navigate.
    • His unserviceable advice only made the situation worse.
What does "unserviceable" mean? | whatsthatwordmean | whatsthatwordmean