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good

adjective (BEHAVIOUR)
 
 
/ɡʊd/ (better, best)

Definition

A2 A good child or animal behaves well: If you're a good boy at the doctor's, I'll take you swimming afterwards.Behaving well able to be trusted: Her credit is good (= she can be trusted to pay her debts).Loyal, faithful and dependable
(Definition of good adjective (BEHAVIOUR) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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