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English definition of “unusable”

unusable

adjective     /ʌnˈjuː.zə.bl̩/
describes something that cannot be used, especially because it is broken or not safe : The normal supply of water has turned brown and unusable. The virus deletes files and corrupts essential core microchips , leaving computers unusable.Not functioningIn bad condition
(Definition of unusable adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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