D defs.my
Entry 1 sense Webster, 1913

Inefficacious

· In·ef·fi·ca·cious · IPA
01 a. Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.
  1. 1.
    Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.
    “The authority of Parliament must become inefficacious . . . to restrain the growth of disorders.” Burke.