“+ adjective
1. : not capable of being used usually by reason of wear, impairment, or obsolescence
an unserviceable car was defined as one which had been driven 40,000 miles — Newsweek
unserviceable equipment may be discarded and replaced
2. : not able to give service or aid : useless , inept
unserviceable and grossly insolent civil servants — G.B.Shaw
despite our best efforts, we proved to be quite unserviceable for his purposes
3. chiefly Britain : incapable of doing military service
ragged, ill-fed, and unserviceable troops
• un·serviceableness “+ noun
• un·serviceably “+ adverb