inefficacious

Adjective

Meaning

Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.

Source: Webster's dictionary

Synonyms

ineffective unable weak empty unsuccessful inadequate null useless inefficient impractical incapable idle vain sterile unfit
Show all synonyms

Antonyms

efficacious economic active successful effective useful
Show all antonyms

Examples

laws that are inefficacious in stopping crime Source: Internet

Close letter words and terms

ineffervescent ineffervescibility ineffervescible inefficaciously inefficaciousness inefficacy