the.com/plagiarism

means The act of taking someone else's words, ideas, or work and passing them off as your own.

from From Latin plagiarius, meaning kidnapper or abductor — originally someone who stole another person's slave or child. The Roman poet Martial griped that a rival was 'kidnapping' his verses by reciting them as his own, stretching the word from literal man-stealing to the theft of words. By the 1600s, English had borrowed it fully into the literary sense we use now — stealing not a person, but a person's work.