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English definition of “insufficient”

insufficient

adjective     /ˌɪn.səˈfɪʃ.ənt/
C1 not enough: insufficient information / time [+ to infinitive] There was insufficient money to fund the project .Scarce, inadequate and not enoughLacking things insufficiently     /-li/ adverb I felt that the whole project was insufficiently researched .Scarce, inadequate and not enoughLacking things
(Definition of insufficient adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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