Webster’s Revised Unabridged Dictionary · 1913
Obstreperous
Ob·strep′er·ous (ŏb·strĕp′ẽr·ŭs), a. [L. obstreperus, from obstrepere to make a noise at; ob (see Ob-) + strepere to make a noise.] Attended by, or making, a loud and tumultuous noise; clamorous; noisy; vociferous. "The obstreperous city." Wordsworth. "Obstreperous approbation." Addison.
Beating the air with their obstreperous beaks. B. Jonson.
— Ob·strep′er·ous·ly, adv. — Ob·strep′er·ous·ness, n.