Choose the word that is the antonym of Efficient.
Show answer & explanation
Correct answer: D
Explanation
Correct Answer
Inefficient
Explanation
The word "efficient" means able to perform a task successfully with minimum waste of time, effort, or resources. Its antonym is "inefficient," which describes someone or something that does not work effectively or requires unnecessary time, effort, or resources to complete a task.
The other options are incorrect. "Productive" means producing good results, "Capable" means having the ability or skill to do something, and "Effective" means producing the intended result. These words are similar in meaning to "efficient" rather than opposite.
Key Point
The prefix "in-" often changes the meaning of an adjective to its opposite. For example, efficient → inefficient, accurate → inaccurate, and complete → incomplete. Understanding common prefixes can help identify antonyms quickly.