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English definition of “unbalanced”

unbalanced

adjective (MENTALLY ILL)    /ʌnˈbæl.ənst/
C2 mentally ill: His relatives have said he became unbalanced after the death of his father.Of unsound mindStupid and silly
(Definition of unbalanced adjective (MENTALLY ILL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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