What are the suffix for improve?

There are no common suffixes specifically used to form words that mean "to improve." However, there are a few suffixes that can be added to "improve" to create related words with different meanings:

* -ment: This suffix forms nouns that indicate the result or process of something. Improvement is the noun form of "improve."

* -able: This suffix indicates capability or possibility. Improvable means "capable of being improved."

* -er: This suffix forms nouns that indicate a person or thing that performs an action. Improver refers to someone or something that improves something.

While these suffixes don't directly mean "to improve," they can help form words related to the concept of improvement.