Synset

fit or ready for use or service
<adj.all>   freq. cnt.: 5 freq. cnt.: 4 freq. cnt.: 1

functional

operable

operational

usable

useable

sample sentences

"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"