The word "indefinite" is an adjective.
Severely is an adverb.
An is an indefinite article. When used with an article, opening is a noun.
indefinite pronoun
The word "an" is an indefinite article and is used before nouns to indicate that the noun is singular and begins with a vowel sound.
The word "indefinite" is an adjective.
indefinite pronoun
Anyone is an indefinite pronoun.
It's an indefinite article which is a type of determiner that precedes a noun. "A" and "An" are indefinite articles, and "The" is a definite article.
an adjective
The English language includes a part of speech that the Latin language doesn't. That part of speech is the article. The Latin language has neither definite nor indefinite articles. So it has no equivalents of 'a' and 'the'.
"Everybody", "somebody", "anybody", and "nobody" are all indefinite pronouns.
"A" is an indefinite article as opposed to "the" which is a definite article. Depending on the context of the sentence it can also be a noun.
Severely is an adverb.
An is an indefinite article. When used with an article, opening is a noun.
indefinite pronoun
The letter 'a' is a noun because it's a thing. All letters of the alphabet are nouns.The word 'a' is an indefinite article. Articles are in the adjective part of speech.