[1] : The Collaborative International Dictionary of English v.0.48

obstreperous \obstrep"erous\, a. l. obstreperus, from
   obstrepere to make a noise at; ob see ob- + strepere to
   make a noise.
   1. attended by, or making, a loud and tumultuous noise;
      clamorous; noisy; vociferous. "the obstreperous city."
      --wordsworth. "obstreperous approbation." --addison.
      1913 webster

            beating the air with their obstreperous beaks. --b.
                                                  jonson.
      1913 webster

   2. resistant to control; unruly.
      pjc -- obstrep"erously, adv. --
      obstrep"erousness, n.
      1913 webster
see also:
ob- obstrep"erously obstrep"erousness 

[2] : WordNet (r) 2.0

obstreperously
     adv : in manner that attracts attention; "obstreperously, he
           demanded to get service" syn: loudly, clamorously
see also:
loudly clamorously 

Obstreperously >> O Words
Obstreperously, definition of term: Obstreperously
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