Which of the following suffixes indicates a state or quality?

The suffix "-ment" is used to indicate a state or quality of something. When added to a verb, it forms a noun that expresses the result or condition of the action. For example, in the word "development," the suffix "-ment" signifies the state or quality of being developed. This creates a clear link between the action and the resulting state, making it a key suffix for conveying these meanings in the English language.

The other suffixes do not primarily indicate a state or quality. The suffix "-ist" typically indicates a person who performs a specific action or is associated with a certain belief or profession. The suffix "-ful" denotes having a certain quality or being full of something, while "-ing" refers to an action or process rather than a state or quality. Therefore, "-ment" specifically aligns with the question's requirement to indicate a state or quality.