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unusable

adjective
 
 
/ʌnˈjuː.zə.bl̩/

Definition

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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