1. Producing no result or effect
   "an unavailing attempt"
   - futile, ineffectual, otiose

See also: useless

• Hypentelium
• Hypentelium nigricans
• hyper
• hyper-eutectoid steel
• hyperacidity
• hyperactive
• hyperactivity
• hyperacusia
• hyperacusis
• hyperadrenalism
• hyperadrenocorticism
• hyperaemia
• hyperaemic
• hyperaesthesia
• hyperaldosteronism
• hyperalimentation
• hyperbaric
• hyperbaric chamber
• hyperbaton
• hyperbetalipoproteinemia
• hyperbilirubinemia
• hyperbilirubinemia of the newborn
• hyperbola
• hyperbole
• hyperbolic