Question

what part of speech is the italicized wor her explanation did not clarify matters much. adverb noun verb adjective

Explanation:

First, we analyze the word "much" in the sentence "Her explanation did not clarify matters much." An adverb is a word that modifies a verb, adjective, or other adverb. Here, "much" modifies the verb "clarify" (showing the degree to which the clarification happened). A noun is a person, place, thing, or idea, and "much" doesn't fit that. A verb is an action or state, and "much" isn't an action. An adjective modifies a noun, but "much" here isn't modifying a noun. So "much" is an adverb.

Answer:

Adverb