inefficacious

• Adjectif signifiant qui ne produit pas l’effet désiré ; inefficace, sans résultat.

An obsolete adjective meaning not producing the desired effect; ineffective.

1. Lacking effectivenessC2formal

   Not having the ability to produce the intended or desired result; ineffective.

   inefficace

   • The treatment proved inefficacious against the disease.
   • His inefficacious attempts to solve the problem only made things worse.
   • The committee deemed the old policy inefficacious and proposed a new one.

   Synonymesfruitlessfutileineffectiveineffectualunavailingunproductiveunsuccessfuluselessvain

   Antonymeseffectiveeffectualefficaciousproductive