Knockoff has become a popular term in the fashion industry, but antonyms for the word are rarely used. If you're looking for a more authentic version of a product, you might search for the opposite of a knockoff. Some antonyms for knockoff might be "original", "genuine", or "authentic". These words suggest that the product is of higher quality and truly reflects the style, design, or brand that it claims. Other possible antonyms for knockoff include "unique", "one-of-a-kind", and "artisanal", which emphasize the handmade or bespoke nature of a product. Ultimately, choosing an antonym for knockoff depends on your priorities as a consumer, whether you value quality, authenticity, or uniqueness.