Most nicked means the most stolen or frequently stolen. Antonyms for this term could include least stolen, rarely stolen, or secure. These words describe items that are not likely to be taken by thieves or are well-protected from theft. Another antonym could be abundant, referring to items that are plentiful and not in danger of being stolen due to their sheer availability. When considering security or theft prevention, antonyms for most nicked could include safeguarded, fortified, or protected, indicating that measures have been taken to prevent theft. Ultimately, using antonyms for most nicked can help describe items or situations that are safe, secure, and well-protected.