Opposite of new

Here are some antonyms of "new":

1. Old
2. Used
3. Second-hand
4. Outdated
5. Antique
6. Vintage
7. Worn-out
8. Tired
9. Familiar
10. Established

Note that some of these antonyms may have slightly different connotations or nuances depending on the context in which they are used. For example, "antique" often implies a sense of age and historical significance, while "outdated" implies a lack of relevance or usefulness.