acumulaste
-you accumulated
The word acumulaste is the preterite form of acumular in the second person singular. There are other translations for this conjugation.
See the full acumular conjugation

acumular

No, no, no, tú acumulaste un nivel de culpa que jamás debería ser superado.
No, no, no, you've accumulated a level of guilt that should never be gotten over.
En definitiva, toda la culpa que acumulaste fue demasiado para ti y reaccionaste de forma agresiva, casi como un hombre.
And all in all, all the blame and guilt that'd piled up over the years became too much for you, and you reacted aggressively, almost like a man I have to say.
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