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KEY: Obstreperous.

SYN: Noisy, uproarious, clamorous, rattling.

ANT: Subdued, quiet, noiseless, inobstreperous.

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KEY: Obstruct.

SYN: Bar, block, choke, hinder, impede, interrupt, retard, clog.

ANT: Open, clear, pave, facilitate, expedite, further, advance, promote, accelerate, aid.

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KEY: Obstruction.