Antonyms of adj unserviceable

2 senses of unserviceable

Sense 1
unserviceable (vs. serviceable) -- (not ready for service; "unserviceable equipment may be replaced")

serviceable (vs. unserviceable) -- (ready for service or able to give long service; "serviceable equipment"; "heavy serviceable fabrics")
        => durable, long-wearing -- (capable of withstanding wear and tear and decay; "durable denim jeans")
        => functional, usable, useable, operable, operational -- (fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order")

Sense 2
unserviceable, unusable, unuseable -- (not capable of being used)

INDIRECT (VIA useless) -> useful, utile -- (being of use or service; "the girl felt motherly and useful"; "a useful job"; "a useful member of society")

Similarity of adj unserviceable

2 senses of unserviceable

Sense 1
unserviceable (vs. serviceable) -- (not ready for service; "unserviceable equipment may be replaced")
       => broken-down -- (not in working order; "had to push the broken-down car"; "a broken-down tractor fit only for children to play on")
       => burned-out, burnt-out -- (inoperative as a result of heat or friction; "a burned-out picture tube")
       => inoperable -- (not able to perform its normal function)
       => unrepaired -- (unserviceable because necessary repairs have not been made)
          Also See-> nonfunctional#1; useless#1

Sense 2
unserviceable, unusable, unuseable -- (not capable of being used)
       => useless (vs. useful) -- (having no beneficial use or incapable of functioning usefully; "a kitchen full of useless gadgets"; "she is useless in an emergency")