“Ill-taught” in the sentence “Better to be untaught than ill-taught” is:

Understanding parts of speech is fundamental to English grammar. An adjective is a word that modifies a noun or pronoun, describing a quality or state. In the phrase “ill-taught,” the word “taught” functions as a past participle acting as an adjective, describing a person or thing. “Ill” modifies “taught,” forming a compound adjective that describes the manner or quality of being taught. Therefore, “ill-taught” collectively acts as an adjective.

• A. Anger is incorrect; it is a noun.
• B. Verb is incorrect; while “taught” is derived from a verb, the compound “ill-taught” functions descriptively.
• D. Adverb is incorrect; an adverb modifies a verb, adjective, or another adverb, but here the entire phrase describes a noun.