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

 

obstreperous

 adjective
adjective
BrE BrE//əbˈstrepərəs//
 
; NAmE NAmE//əbˈstrepərəs//
 
(formal or humorous)
 
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noisy and difficult to control Word Origin late 16th cent. (in the sense ‘clamorous, loud’): from Latin obstreperus (from obstrepere, from ob- ‘against’ + strepere ‘make a noise’) + -ous.
See the Oxford Advanced American Dictionary entry: obstreperous