Ineffective relates to something that fails to achieve its desired outcome or lacks the necessary potency to accomplish a task successfully. There are various synonyms for ineffective, including inefficient, useless, unproductive, powerless, feeble, and inept. Inefficient suggests an inability to accomplish a task quickly or with minimum effort, while useless refers to something that has no practical value. Unproductive describes something that produces little to no effect, powerless indicates something lacking in force, and inept refers to something that is awkward or clumsy in execution. Therefore, when looking for alternate ways to describe the inefficacy of something, you can pick other words that accurately capture the context and nuance of the situation.