Simple past tense and past participle of impede.(verb)
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Use "impeded" in a sentence
"A furious storm of rain impeded the promised advance of the army, but a statement received from the South announces that General Hooker had crossed the Rappahannock."
"Mr. Krongard was also said to have "impeded" a Justice Department probe into allegations of weapons smuggling by Blackwater Inc., the civilian contractor in Iraq."
"Zimbabwean officials after authorities "impeded" US diplomats 'attempts to meet with Meldrum on Thursday and Friday."