inefficacious

About 0.05 uses per million words.

Meaning

1. adjective Incapable of having the intended consequence.
2. adjective Not effective.

Similar words

ineffectual inefficient ineffective unefficacious nonefficacious ineffectible uneffectual futile noneffectual ineffectuall

Often followed by

in and for to as or with drugs because

Word family

inefficaciously inefficaciousness inefficaciousnesses