un availing (adjective) unavailing: futile
Sinonime: barren,
empty,
exhausted,
fruitless,
idle,
impractical, in vain,
ineffective,
ineffectual, on a treadmill, save one's breath, to no avail, to no effect, to no purpose,
trifling,
trivial, unproductive, unprofitable,
unsuccessful,
useless,
vain, valueless,
worthless