Final answer:
The suffix -ism is not an adjective suffix; it is actually a noun suffix used to form nouns from verbs or adjectives.
Step-by-step explanation:
The suffix -ism is NOT an adjective suffix. It is actually a noun suffix that is used to form nouns from verbs or adjectives. For example, in the word capitalism, the suffix -ism is added to the adjective capital to form the noun capitalism which refers to an economic system.
Learn more about Suffixes in English