Reborrowing
English uses many loanwords borrowed from French, Latin, and Greek, which is why many scientific words are made using words and word roots from these same languages. For example, the word "telegram" comes from the Greek roots "tele-", which means "distant/far", and "-gram/-graph", which means "writing", thus a telegram is a machine that sends written messages from far away. This word came back into Greek as τηλεγράφημα telegráfima.