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English definition of “unsound”

unsound

adjective (NOT ACCEPTABLE)    /ʌnˈsaʊnd/
If a person's activities or judgment are unsound, they are not good enough, acceptable, or able to be trusted: unsound accounting practices unsound police evidenceNot good enoughWrong
(Definition of unsound adjective (NOT ACCEPTABLE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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