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troublesome

adjective
 
 
/ˈtrʌb.l̩.səm/

Definition

C2 causing a lot of problems for someone: Her hip has been troublesome for quite a while, and she'll probably need surgery on it. The negotiations have proven more troublesome than any of us expected.Dangerous and harmful
(Definition of troublesome adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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