ineffectively

This adverb carries a strong negative connotation, emphasizing a failure to achieve a specific goal or a lack of potency. It is frequently used in professional, medical, or technical contexts to describe a process, treatment, or strategy that did not yield the expected outcome.

While "inefficiently" refers to a waste of time, energy, or resources, "ineffectively" focuses strictly on the result. A process can be efficient (fast and cheap) but still be ineffective if it fails to solve the problem it was intended to address.