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

 

rebarbative

 adjective
adjective
BrE BrE//ˈbɑːbətɪv//
 
; NAmE NAmE//ˈbɑːrbətɪv//
 
(formal)
 
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not attractive synonym objectionable Word Origin late 19th cent.: from French rébarbatif, -ive, from Old French se rebarber ‘face each other “beard to beard” aggressively’, from barbe ‘beard’.
See the Oxford Advanced American Dictionary entry: rebarbative