Which prefixes also mean against?
Some prefixes that also mean against are:
1. Anti-
2. Contra-
3. Counter-
4. De-
5. Dis-
6. In-/Im-/Il-/Ir- (when used with certain words)
7. Non-
8. Un-
9. Anti-
10. Ob-/Op- (when used with certain words)
It's important to note that the meaning of a prefix can vary depending on the word it is attached to.