- unserviceable - not ready for service; "unserviceable equipment may be replaced"
Antonyms: serviceable, durable, long-wearing, fixable, repairable, maintained, repaired, serviced, functional, usable, useable, in working order, operable, operational
- unserviceable, unusable, unuseable - impossible to use
Antonyms: useful, utile (indirect, via useless)