Definition of unbreakable adjective from the Oxford Advanced American Dictionary

     

    unbreakable

     adjective
    adjective
    NAmE//ʌnˈbreɪkəbl//
     
     
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  1. 1impossible to break synonym indestructible
  2. 2 This new material is virtually unbreakable. the unbreakable bond between parent and child opposite breakable
See the Oxford Advanced Learner's Dictionary entry: unbreakable