The word "copiest" refers to someone who makes copies of something. As with many words, "copiest" has antonyms, which are words that have the opposite meaning. One antonym for "copiest" is "original creator" or "innovator," which refers to someone who comes up with new ideas and creates something new instead of just copying something that already exists. Another antonym for "copiest" is "destroyer" or "eliminator," which refers to someone or something that causes the destruction or elimination of something. Other antonyms could include "unoriginal," "derivative," or "imitator," all of which suggest a lack of innovation or creativity.