What is the opposite of efficient?

Need antonyms for efficient? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
(of a system) Opposite of capable of maximizing productivity at no expense of extra resources
“Procedures that were set up to expose and correct dishonesty were themselves blocked or shown to be inefficient.”
Adjective
Opposite of able to produce results, or cause effects
“To this end, ineffectual tools are usually worse than having no tools at all.”
Adjective
(attributive to a person) Opposite of having the ability to make prudent and careful decisions on the use of resources
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“He is either deliberately misconstruing the statement, or is utterly incompetent.”
Adjective
Opposite of having the ability to produce financial growth or gain
“This is an unprofitable business and some big decisions will need to be made soon on its future.”
Adjective
Opposite of in an organized manner
Adjective
Opposite of using materials at hand efficiently
“This is a wasteful process that will cause a net loss of nitrogen to livestock and pollution of the environment.”
Adjective
Opposite of of or relating to utility
Adjective
Opposite of practical, concerned with making decisions and actions that are useful in practice, not just theory
Adjective
Opposite of denotes the effectiveness or dominance of a particular action
“Leaders who do not look after the interests of their followers are not only unethical but ineffective.”
Adjective
Opposite of better or effective
Adjective
Opposite of being in effective or current operation, action, or force
Adjective
Opposite of convincing or effective
Adjective
(of persons) Opposite of influential or powerful in rank, position, or status
“He was touted as a great and strong leader but ultimately proved to be highly uninfluential.”
Adjective
Opposite of without obstructions or difficulties
“Going on holidays with children can be both an exciting and fraught prospect.”
Adjective
Opposite of complete with regard to every detail
“He was relieved a minute later when the soldier left after only a cursory check of the room, seeming completely unsuspicious.”
Adjective
Opposite of being in a healthy and functional state
“His faculties were still ailing after having endured multiple concussions during his sporting career.”
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