Which of the following is an example of a noun suffix?

The choice of "-ship" as a noun suffix is accurate because it is used to form nouns that indicate a state, condition, or quality. For instance, the word "friendship" combines the base noun "friend" with the suffix "-ship" to describe the state of being friends. Noun suffixes typically create new nouns from existing words, thereby expanding vocabulary and enabling more precise expression of concepts.

The other suffixes listed have different functions. For example, "-en" can indicate a verb form (as in "strengthen"), while "-ful" often creates adjectives that describe the quality of being full of something (such as "joyful"). Similarly, "-ish" typically forms adjectives that convey a sense of relating to or resembling something (like "childish"). Understanding the specific roles of these suffixes is crucial in mastering language mechanics and vocabulary development.