What are the opposite words for efficaciously?

Efficaciously is an adverb that means effectively or efficiently. Some antonyms for efficaciously could be inefficiently or ineffectively. If something is done inefficiently, it is done with waste, extra effort or time, or lower quality than what could have been achieved. Ineffectively means that something was not able to produce the desired or necessary results. Other antonyms we could use for efficaciously include unproductively, fruitlessly, lame, feebly, ineptly, or unprofitable. When using antonyms for efficaciously, it is important to choose the right one that fits the context in which it will be used.

Antonym of the day

dry, pass up, underwhelm.