The term "patterned after" signifies something that has been imitated or copied from a particular source. Its antonyms include words like original, unique, and unprecedented, which signify one-of-a-kind attributes, qualities, or characteristics. While "patterned after" emphasizes the replication of a pre-existing blueprint, the opposite meaning connotes innovation, creativity, and ingenuity. Other antonyms of "patterned after" include independent, autonomous, and self-originating, which all imply a degree of originality and authenticity that is not borrowed or derived from another source. Therefore, the antonyms of "patterned after" emphasize the importance of individuality and creativity, rather than imitation and replication.