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English definition of “inefficient”

inefficient

adjective     /ˌɪnɪˈfɪʃənt/
Inefficient people or things waste time, money, or effort, and do not achieve as much as they should: an inefficient heating systemUseless and futile
inefficiently adverb inefficiency     /ˌɪnɪˈfɪʃənsi/ noun [C, U]
(Definition of inefficient adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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