抄袭 (chāo xí): to plagiarize; to copy; to attack the flank or rear of an enemy

The teacher found that Xiao Ming's paper was almost identical to an article online and immediately concluded that he had plagiarized.

This company was ordered by the court to pay a large sum of money because it plagiarized a competitor's design.

He firmly denied plagiarizing, saying that all citations were properly attributed, but his classmates still doubted him.

Many singers get sued for plagiarizing others' melodies and eventually have to apologize publicly.