(1)noisily and stubbornly defiant; "obstreperous boys"
(2)騒々しく、頑として挑戦的な
(3)boisterously and noisily aggressive; "kept up an obstreperous clamor"
(4)荒々しく、また騒がしく攻撃的な
(5)completely out of control; "runaway inflation"
(6)全く制御できない
(1)