Simple past tense and past participle of accumulate.(verb)
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Use "accumulated" in a sentence
"For some people, who can see no other solution, enduring the routine and boredom of daily "have-to" travel has been made more tolerable by looking forward to long-planned "want-to" trips -- almost as if pain accumulated now can at some point be exchanged for pleasure."
"Iberdrola said it has the right to receive € 4.42 billion in accumulated tariff deficit payments."
"$8T in accumulated debt from ware in Iraq, Medicare Part D, tax cuts"