What is the prefix modest?

There isn't a prefix called "modest." "Modest" is a word on its own, meaning:

* Not arrogant or boastful: A modest person doesn't brag about their achievements.

* Simple and unpretentious: A modest home is not flashy or extravagant.

* Of moderate size or amount: A modest salary is not very high.

However, there are prefixes that can be used to create related words, such as:

* Im-: As in immodest, meaning not modest or lacking modesty.

* De-: As in demodulate, which is a technical term related to changing signals.

If you're looking for a word that specifically means "small" or "limited" and you're thinking of "modest," you might be thinking of the prefix mini-, micro-, or sub-.

Let me know if you have more context or if you're looking for something else!