What are the opposite words for efficiency?

Efficiency is defined as the ability to complete a task or function with minimum waste and maximum productivity. The opposite of efficiency is inefficiency. Inefficiency means the inability to perform a task or function quickly or with minimum waste, leading to time and resource wastage. Another antonym for efficiency is sluggishness, which refers to slow or lazy movement or progress. Lack of efficiency is also synonymous with the word ineffectiveness, which means the inability to produce the desired outcome, leading to failure. Lastly, inefficiency can be described as ineptitude or incompetence, meaning the lack of skill, knowledge, or capability to perform a task or function effectively.

Antonym of the day

putting gear
close, disenchant, disgust.