However, you could use prefixes that convey similar meanings, such as:
* Un-: This creates the word "unignoble", which emphasizes the lack of nobility.
* Dis-: This creates the word "disignoble", which signifies a departure from nobility.
* In-: While "in" is already part of "ignoble", it reinforces the idea of being "not noble".
You could also use prefixes related to specific aspects of nobility, such as:
* De-: To suggest a degradation or lowering of nobility (e.g., "deignoble").
* Non-: To indicate a complete absence of nobility (e.g., "non-ignoble").
Ultimately, the choice of prefix depends on the specific nuance you want to convey.