Adjacent is an adjective, so it modifies a noun.
The term "adjacent angles" is a plural noun. The singular is "adjacent angle".
Gag answer: adverds Real answer: adverbs
Modifier is a noun.
when this and that are used to modify nouns they are treated as which part of speech
adjectives
nouns and pronouns.
Gag answer: adverds Real answer: adverbs
The word "selfishly" is an adverb because it can be used to modify verbs or adjectives.
"Bi" can function as a prefix in English, typically meaning "two" or "twice." It is not a standalone part of speech but a morpheme that can be added to words to modify their meaning.
The part of speech that answers the question "what kind" is an adjective. Adjectives describe or modify nouns and pronouns by providing information about their qualities or characteristics.
A verb is modified by an adverb or an adverbial phrase.
An adverb can modify verbs, adjectives and other adverbs.