Synonyms of unserviceable

Adjective

1. unserviceable (vs. serviceable), broken-down, burned-out, burnt-out, inoperable, unrepaired, nonfunctional, useless

usage: not ready for service; "unserviceable equipment may be replaced"

2. unserviceable, unusable, unuseable, useless (vs. useful)

usage: not capable of being used