erträumten
"erträumten" is the past participle of the German verb "erträumen," which translates to "to dream of" or "to dream up." It is used in German grammar to form the perfect tenses (Perfekt, Plusquamperfekt, Futur II) or as an adjective describing something that has been dreamt of or imagined.
For example, in the sentence "Ich habe von einer Reise geträumt," the verb "geträumt" is the past
The prefix "er-" often implies completion, achievement, or a process that has been undertaken. Therefore, "erträumen"