I₁N₁E₁F₄F₄I₁C₃A₁C₃I₁O₁U₁S₁

23 points

INEFFICACIOUS is validvalid

not efficacious [adj] : INEFFICACIOUSLY [adv]

181,271 of 196,601 in NWL2023·also valid in CSW24

lacking the power to produce a desired effect [adj INEFFICACIOUSLY]

119,669 of 280,887 in CSW24·also valid in NWL2023