Definition of unbearable adjective from the Oxford Advanced American Dictionary

     

    unbearable

     adjective
    adjective
    NAmE//ʌnˈbɛrəbl//
     
     
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  1. 1too painful, annoying, or unpleasant to deal with or accept synonym intolerable
  2. 2 The heat was becoming unbearable. unbearable pain He's been unbearable since he won that prize. opposite bearable
NAmE//ʌnˈbɛrəbli//
 
adverb unbearably hot He was so unbearably smug about winning.
See the Oxford Advanced Learner's Dictionary entry: unbearable