“Plagiarism” comes from the Latin word plagiarius, which means “kidnapper.” Students need to quote and attribute referenced sources for most of their assignments. But when the reader is left to believe that the words are the author’s own, it is considered academic dishonesty and the penalties can be severe.
http://bizblogs.fullerton.edu/blog/2016/07/23/avoid-a-plagiarism-scandal-with-these-five-tips