Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Adjective: inefficacious  in,e-fu'key-shus
  1. Lacking the power to produce a desired effect
    "laws that are inefficacious in stopping crime"

See also: efficaciousness, efficacy, ineffective, ineffectual, uneffective

Antonym: efficacious