Definition of insufferable adjective from the Oxford Advanced Learner's Dictionary

 

insufferable

 adjective
adjective
BrE BrE//ɪnˈsʌfrəbl//
 
; NAmE NAmE//ɪnˈsʌfrəbl//
 
Describing annoying traits
 
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extremely annoying, unpleasant and difficult to bear synonym unbearable insufferable pride He’s insufferable! See related entries: Describing annoying traits Word Origin late Middle English: perhaps via French (now dialect) insouffrable, based on Latin sufferre ‘endure’ (from sub- ‘from below’ + ferre ‘to bear’).
See the Oxford Advanced American Dictionary entry: insufferable