What is another word for ineffective?

Here are some synonyms for "ineffective," depending on the specific context:

General:

* Futile

* Useless

* Fruitless

* Unsuccessful

* Impotent

* Unproductive

* Counterproductive

* Worthless

* Pointless

More specific:

* For a person: Incompetent, inept, incapable, unskillful

* For a process: Inefficient, inefficient, inadequate, insufficient, lacking

* For a strategy: Unworkable, flawed, unsuitable, misguided

* For a medication: Inefficacious, inoperative

The best synonym will depend on the specific situation and the meaning you want to convey.