Question

noun
verb
adjective
adverb
pronoun
preposition
conjunction
interjection
a word or phrase used to express emotion or feeling. a short, sudden utterance that stands apart from the rest of the sentence and can be punctuated with an exclamation point
: a word that connects words, phrases, or sentences
: a word that replaces a noun or noun phrase
: a word that shows details about ideas in a sentence, often indicating location, direction, or time
: a word that describes a verb, adjective, another adverb
: a word that describes or gives more information about a noun or pronoun
: a word used to describe an action or state of being; forms the main part of the predicate of a sentence

Explanation:

The description "a word or phrase used to express emotion or feeling. A short, sudden utterance that stands apart from the rest of the sentence and can be punctuated with an exclamation point" corresponds to an interjection. An interjection is a part - of - speech used for such emotional expressions.

Answer:

interjection