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English definition of “Jekyll and Hyde”

Jekyll and Hyde

noun [S]     /ˌdʒek.l̩.əndˈhaɪd/ disapproving
a person with two very different sides to their personality, one good and the other evil: The professor was a real Jekyll and Hyde - sometimes kind and charming, and at other times rude and obnoxious.Mental and psychiatric disorders
(Definition of Jekyll and Hyde noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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